74580643 has 4 divisors (see below), whose sum is σ = 78505960. Its totient is φ = 70655328.

The previous prime is 74580617. The next prime is 74580647. The reversal of 74580643 is 34608547.

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 74580643 - 2²⁵ = 41026211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74580647) 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, 1962630 + ... + 1962667.

It is an arithmetic number, because the mean of its divisors is an integer number (19626490).

Almost surely, 2^74580643 is an apocalyptic number.

74580643 is a deficient number, since it is larger than the sum of its proper divisors (3925317).

74580643 is a wasteful number, since it uses less digits than its factorization.

74580643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925316.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 74580643 is about 8636.0085108805. The cubic root of 74580643 is about 420.9288644825.

The spelling of 74580643 in words is "seventy-four million, five hundred eighty thousand, six hundred forty-three".