74869991 has 24 divisors (see below), whose sum is σ = 93855744. Its totient is φ = 59376240.

The previous prime is 74869961. The next prime is 74870017. The reversal of 74869991 is 19996847.

It is a happy number.

It is not a de Polignac number, because 74869991 - 2¹⁰ = 74868967 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 (74869931) 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, 33866 + ... + 36008.

It is an arithmetic number, because the mean of its divisors is an integer number (3910656).

Almost surely, 2^74869991 is an apocalyptic number.

74869991 is a deficient number, since it is larger than the sum of its proper divisors (18985753).

74869991 is a wasteful number, since it uses less digits than its factorization.

74869991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2204 counting only the distinct ones).

The product of its digits is 979776, while the sum is 53.

The square root of 74869991 is about 8652.7447090504. The cubic root of 74869991 is about 421.4725165211.

The spelling of 74869991 in words is "seventy-four million, eight hundred sixty-nine thousand, nine hundred ninety-one".