74417989 has 16 divisors (see below), whose sum is σ = 78722928. Its totient is φ = 70267392.

The previous prime is 74417971. The next prime is 74418023. The reversal of 74417989 is 98971447.

It can be written as a sum of positive squares in 8 ways, for example, as 3150625 + 71267364 = 1775^2 + 8442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74417989 is a prime.

It is a Duffinian number.

Its product of digits (508032) is a multiple of the sum of its prime divisors (504).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74417909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268519 + ... + 268795.

It is an arithmetic number, because the mean of its divisors is an integer number (4920183).

Almost surely, 2^74417989 is an apocalyptic number.

It is an amenable number.

74417989 is a deficient number, since it is larger than the sum of its proper divisors (4304939).

74417989 is a wasteful number, since it uses less digits than its factorization.

74417989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504.

The product of its digits is 508032, while the sum is 49.

The square root of 74417989 is about 8626.5861729887. The cubic root of 74417989 is about 420.6226384798.

The spelling of 74417989 in words is "seventy-four million, four hundred seventeen thousand, nine hundred eighty-nine".