74337991 has 32 divisors (see below), whose sum is σ = 100275840. Its totient is φ = 53415936.

The previous prime is 74337983. The next prime is 74337997. The reversal of 74337991 is 19973347.

It is not a de Polignac number, because 74337991 - 2³ = 74337983 is a prime.

It is a super-2 number, since 2×74337991² = 11052273811832162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74337997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44035 + ... + 45691.

It is an arithmetic number, because the mean of its divisors is an integer number (3133620).

Almost surely, 2^74337991 is an apocalyptic number.

74337991 is a deficient number, since it is larger than the sum of its proper divisors (25937849).

74337991 is a wasteful number, since it uses less digits than its factorization.

74337991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723.

The product of its digits is 142884, while the sum is 43.

The square root of 74337991 is about 8621.9482137160. The cubic root of 74337991 is about 420.4718638492.

The spelling of 74337991 in words is "seventy-four million, three hundred thirty-seven thousand, nine hundred ninety-one".