74972989 has 24 divisors (see below), whose sum is σ = 96490968. Its totient is φ = 57697920.

The previous prime is 74972983. The next prime is 74972999. The reversal of 74972989 is 98927947.

It can be written as a sum of positive squares in 4 ways, for example, as 2160900 + 72812089 = 1470^2 + 8533^2 .

It is not a de Polignac number, because 74972989 - 2¹⁵ = 74940221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74972983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21979 + ... + 25159.

It is an arithmetic number, because the mean of its divisors is an integer number (4020457).

Almost surely, 2^74972989 is an apocalyptic number.

It is an amenable number.

74972989 is a deficient number, since it is larger than the sum of its proper divisors (21517979).

74972989 is a wasteful number, since it uses less digits than its factorization.

74972989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245 (or 3238 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The square root of 74972989 is about 8658.6944165965. The cubic root of 74972989 is about 421.6656999948.

The spelling of 74972989 in words is "seventy-four million, nine hundred seventy-two thousand, nine hundred eighty-nine".