74497689 has 72 divisors (see below), whose sum is σ = 139782240. Its totient is φ = 37884672.

The previous prime is 74497669. The next prime is 74497721. The reversal of 74497689 is 98679447.

It is a happy number.

74497689 is a `hidden beast` number, since 74 + 497 + 6 + 89 = 666.

It is not a de Polignac number, because 74497689 - 2¹⁵ = 74464921 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74497669) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 142182 + ... + 142704.

It is an arithmetic number, because the mean of its divisors is an integer number (1941420).

Almost surely, 2^74497689 is an apocalyptic number.

It is an amenable number.

74497689 is a deficient number, since it is larger than the sum of its proper divisors (65284551).

74497689 is a wasteful number, since it uses less digits than its factorization.

74497689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 569 counting only the distinct ones).

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

The square root of 74497689 is about 8631.2043771423. The cubic root of 74497689 is about 420.7727440486.

The spelling of 74497689 in words is "seventy-four million, four hundred ninety-seven thousand, six hundred eighty-nine".