74459891 has 12 divisors (see below), whose sum is σ = 83592096. Its totient is φ = 66245520.

The previous prime is 74459843. The next prime is 74459897. The reversal of 74459891 is 19895447.

It is not a de Polignac number, because 74459891 - 2¹⁴ = 74443507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74459897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 860 + ... + 12233.

It is an arithmetic number, because the mean of its divisors is an integer number (6966008).

Almost surely, 2^74459891 is an apocalyptic number.

74459891 is a deficient number, since it is larger than the sum of its proper divisors (9132205).

74459891 is a wasteful number, since it uses less digits than its factorization.

74459891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13162 (or 13151 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 74459891 is about 8629.0144860233. The cubic root of 74459891 is about 420.7015693184.

The spelling of 74459891 in words is "seventy-four million, four hundred fifty-nine thousand, eight hundred ninety-one".