74109531 has 8 divisors (see below), whose sum is σ = 98861584. Its totient is φ = 49381920.

The previous prime is 74109521. The next prime is 74109533. The reversal of 74109531 is 13590147.

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

It is not a de Polignac number, because 74109531 - 2⁷ = 74109403 is a prime.

It is a super-2 number, since 2×74109531² = 10984445170079922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74109533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2841 + ... + 12501.

It is an arithmetic number, because the mean of its divisors is an integer number (12357698).

Almost surely, 2^74109531 is an apocalyptic number.

74109531 is a deficient number, since it is larger than the sum of its proper divisors (24752053).

74109531 is a wasteful number, since it uses less digits than its factorization.

74109531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12221.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 74109531 is about 8608.6892730543. The cubic root of 74109531 is about 420.0406820004.

Adding to 74109531 its reverse (13590147), we get a palindrome (87699678).

The spelling of 74109531 in words is "seventy-four million, one hundred nine thousand, five hundred thirty-one".