74920891 has 8 divisors (see below), whose sum is σ = 78274800. Its totient is φ = 71618400.

The previous prime is 74920889. The next prime is 74920903. The reversal of 74920891 is 19802947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74920891 - 2¹ = 74920889 is a prime.

It is a super-2 number, since 2×74920891² = 11226279816467762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74920801) 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 7 ways as a sum of consecutive naturals, for example, 9861 + ... + 15718.

It is an arithmetic number, because the mean of its divisors is an integer number (9784350).

Almost surely, 2^74920891 is an apocalyptic number.

74920891 is a deficient number, since it is larger than the sum of its proper divisors (3353909).

74920891 is a wasteful number, since it uses less digits than its factorization.

74920891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25709.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 74920891 is about 8655.6854725666. The cubic root of 74920891 is about 421.5680068997.

The spelling of 74920891 in words is "seventy-four million, nine hundred twenty thousand, eight hundred ninety-one".