74527431 has 8 divisors (see below), whose sum is σ = 108403584. Its totient is φ = 45168120.

The previous prime is 74527399. The next prime is 74527433. The reversal of 74527431 is 13472547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74527431 - 2⁵ = 74527399 is a prime.

It is a super-2 number, since 2×74527431² = 11108675942919522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2258407 = 74527431 / (7 + 4 + 5 + 2 + 7 + 4 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 74527392 and 74527401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74527433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1129171 + ... + 1129236.

It is an arithmetic number, because the mean of its divisors is an integer number (13550448).

Almost surely, 2^74527431 is an apocalyptic number.

74527431 is a deficient number, since it is larger than the sum of its proper divisors (33876153).

74527431 is a wasteful number, since it uses less digits than its factorization.

74527431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258421.

The product of its digits is 23520, while the sum is 33.

The square root of 74527431 is about 8632.9271397366. The cubic root of 74527431 is about 420.8287321742.

Adding to 74527431 its reverse (13472547), we get a palindrome (87999978).

The spelling of 74527431 in words is "seventy-four million, five hundred twenty-seven thousand, four hundred thirty-one".