74759991 has 16 divisors (see below), whose sum is σ = 101352960. Its totient is φ = 49008960.

The previous prime is 74759989. The next prime is 74760013. The reversal of 74759991 is 19995747.

It is a happy number.

It is not a de Polignac number, because 74759991 - 2¹ = 74759989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74759921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77971 + ... + 78923.

It is an arithmetic number, because the mean of its divisors is an integer number (6334560).

Almost surely, 2^74759991 is an apocalyptic number.

74759991 is a deficient number, since it is larger than the sum of its proper divisors (26592969).

74759991 is a wasteful number, since it uses less digits than its factorization.

74759991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366.

The product of its digits is 714420, while the sum is 51.

The square root of 74759991 is about 8646.3860080383. The cubic root of 74759991 is about 421.2660043170.

The spelling of 74759991 in words is "seventy-four million, seven hundred fifty-nine thousand, nine hundred ninety-one".