74704391 has 4 divisors (see below), whose sum is σ = 77952432. Its totient is φ = 71456352.

The previous prime is 74704387. The next prime is 74704393. The reversal of 74704391 is 19340747.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74704391 - 2² = 74704387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74704393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623986 + ... + 1624031.

It is an arithmetic number, because the mean of its divisors is an integer number (19488108).

Almost surely, 2^74704391 is an apocalyptic number.

74704391 is a deficient number, since it is larger than the sum of its proper divisors (3248041).

74704391 is a wasteful number, since it uses less digits than its factorization.

74704391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248040.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 74704391 is about 8643.1701938583. The cubic root of 74704391 is about 421.1615447059.

The spelling of 74704391 in words is "seventy-four million, seven hundred four thousand, three hundred ninety-one".