74908643 has 4 divisors (see below), whose sum is σ = 74938968. Its totient is φ = 74878320.

The previous prime is 74908627. The next prime is 74908657. The reversal of 74908643 is 34680947.

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 74908643 - 2⁴ = 74908627 is a prime.

It is a super-2 number, since 2×74908643² = 11222609592202898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74908643.

It is not an unprimeable number, because it can be changed into a prime (74908693) 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, 11093 + ... + 16518.

It is an arithmetic number, because the mean of its divisors is an integer number (18734742).

Almost surely, 2^74908643 is an apocalyptic number.

74908643 is a deficient number, since it is larger than the sum of its proper divisors (30325).

74908643 is a wasteful number, since it uses less digits than its factorization.

74908643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30324.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 74908643 is about 8654.9779318032. The cubic root of 74908643 is about 421.5450331280.

The spelling of 74908643 in words is "seventy-four million, nine hundred eight thousand, six hundred forty-three".