74423431 has 2 divisors, whose sum is σ = 74423432. Its totient is φ = 74423430.

The previous prime is 74423429. The next prime is 74423443. The reversal of 74423431 is 13432447.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74423431 - 2¹ = 74423429 is a prime.

It is a super-2 number, since 2×74423431² = 11077694163623522, which contains 22 as substring.

Together with 74423429, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 74423431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74424431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37211715 + 37211716.

It is an arithmetic number, because the mean of its divisors is an integer number (37211716).

Almost surely, 2^74423431 is an apocalyptic number.

74423431 is a deficient number, since it is larger than the sum of its proper divisors (1).

74423431 is an equidigital number, since it uses as much as digits as its factorization.

74423431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 28.

The square root of 74423431 is about 8626.9015874762. The cubic root of 74423431 is about 420.6328912544.

Adding to 74423431 its reverse (13432447), we get a palindrome (87855878).

The spelling of 74423431 in words is "seventy-four million, four hundred twenty-three thousand, four hundred thirty-one".