74745407 has 4 divisors (see below), whose sum is σ = 81540456. Its totient is φ = 67950360.

The previous prime is 74745347. The next prime is 74745409. The reversal of 74745407 is 70454747.

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 74745407 - 2¹² = 74741311 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 (74745409) 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, 3397508 + ... + 3397529.

It is an arithmetic number, because the mean of its divisors is an integer number (20385114).

Almost surely, 2^74745407 is an apocalyptic number.

74745407 is a deficient number, since it is larger than the sum of its proper divisors (6795049).

74745407 is a wasteful number, since it uses less digits than its factorization.

74745407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6795048.

The product of its (nonzero) digits is 109760, while the sum is 38.

The square root of 74745407 is about 8645.5426087667. The cubic root of 74745407 is about 421.2386093478.

The spelling of 74745407 in words is "seventy-four million, seven hundred forty-five thousand, four hundred seven".