74739431 has 8 divisors (see below), whose sum is σ = 80572464. Its totient is φ = 68918400.

The previous prime is 74739421. The next prime is 74739439. The reversal of 74739431 is 13493747.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 74739431 - 2¹⁸ = 74477287 is a prime.

It is a super-2 number, since 2×74739431² = 11171965092407522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74739439) 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, 13220 + ... + 18006.

It is an arithmetic number, because the mean of its divisors is an integer number (10071558).

Almost surely, 2^74739431 is an apocalyptic number.

74739431 is a deficient number, since it is larger than the sum of its proper divisors (5833033).

74739431 is a wasteful number, since it uses less digits than its factorization.

74739431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001.

The product of its digits is 63504, while the sum is 38.

The square root of 74739431 is about 8645.1969902368. The cubic root of 74739431 is about 421.2273828430.

The spelling of 74739431 in words is "seventy-four million, seven hundred thirty-nine thousand, four hundred thirty-one".