74647989 has 24 divisors (see below), whose sum is σ = 117287352. Its totient is φ = 45475200.

The previous prime is 74647973. The next prime is 74647997. The reversal of 74647989 is 98974647.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17766225 + 56881764 = 4215^2 + 7542^2 .

It is not a de Polignac number, because 74647989 - 2⁴ = 74647973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74647939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8659 + ... + 14975.

It is an arithmetic number, because the mean of its divisors is an integer number (4886973).

Almost surely, 2^74647989 is an apocalyptic number.

It is an amenable number.

74647989 is a deficient number, since it is larger than the sum of its proper divisors (42639363).

74647989 is a wasteful number, since it uses less digits than its factorization.

74647989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437 (or 6434 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 74647989 is about 8639.9067703303. The cubic root of 74647989 is about 421.0555253505.

The spelling of 74647989 in words is "seventy-four million, six hundred forty-seven thousand, nine hundred eighty-nine".