74305891 has 4 divisors (see below), whose sum is σ = 81060984. Its totient is φ = 67550800.

The previous prime is 74305883. The next prime is 74305909. The reversal of 74305891 is 19850347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19850347 = 11 ⋅1804577.

It is a cyclic number.

It is not a de Polignac number, because 74305891 - 2³ = 74305883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74305891.

It is not an unprimeable number, because it can be changed into a prime (74305871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3377530 + ... + 3377551.

It is an arithmetic number, because the mean of its divisors is an integer number (20265246).

Almost surely, 2^74305891 is an apocalyptic number.

74305891 is a deficient number, since it is larger than the sum of its proper divisors (6755093).

74305891 is a wasteful number, since it uses less digits than its factorization.

74305891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755092.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 74305891 is about 8620.0864844849. The cubic root of 74305891 is about 420.4113336060.

The spelling of 74305891 in words is "seventy-four million, three hundred five thousand, eight hundred ninety-one".