74899891 has 8 divisors (see below), whose sum is σ = 85261824. Its totient is φ = 65130120.

The previous prime is 74899889. The next prime is 74899897. The reversal of 74899891 is 19899847.

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

It is not a de Polignac number, because 74899891 - 2¹ = 74899889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74899897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147771 + ... + 148276.

It is an arithmetic number, because the mean of its divisors is an integer number (10657728).

Almost surely, 2^74899891 is an apocalyptic number.

74899891 is a deficient number, since it is larger than the sum of its proper divisors (10361933).

74899891 is a wasteful number, since it uses less digits than its factorization.

74899891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296081.

The product of its digits is 1306368, while the sum is 55.

The square root of 74899891 is about 8654.4723120477. The cubic root of 74899891 is about 421.5286153259.

The spelling of 74899891 in words is "seventy-four million, eight hundred ninety-nine thousand, eight hundred ninety-one".