74989591 has 4 divisors (see below), whose sum is σ = 78250032. Its totient is φ = 71729152.

The previous prime is 74989573. The next prime is 74989597. The reversal of 74989591 is 19598947.

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 74989591 - 2¹³ = 74981399 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 (74989597) 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, 1630186 + ... + 1630231.

It is an arithmetic number, because the mean of its divisors is an integer number (19562508).

Almost surely, 2^74989591 is an apocalyptic number.

74989591 is a deficient number, since it is larger than the sum of its proper divisors (3260441).

74989591 is a wasteful number, since it uses less digits than its factorization.

74989591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260440.

The product of its digits is 816480, while the sum is 52.

The square root of 74989591 is about 8659.6530530963. The cubic root of 74989591 is about 421.6968222136.

The spelling of 74989591 in words is "seventy-four million, nine hundred eighty-nine thousand, five hundred ninety-one".