74398131 has 24 divisors (see below), whose sum is σ = 109770336. Its totient is φ = 48545280.

The previous prime is 74398117. The next prime is 74398187. The reversal of 74398131 is 13189347.

It is a happy number.

It is not a de Polignac number, because 74398131 - 2⁵ = 74398099 is a prime.

It is a super-2 number, since 2×74398131² = 11070163792586322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74398111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110211 + ... + 110883.

It is an arithmetic number, because the mean of its divisors is an integer number (4573764).

Almost surely, 2^74398131 is an apocalyptic number.

74398131 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

74398131 is a deficient number, since it is larger than the sum of its proper divisors (35372205).

74398131 is a wasteful number, since it uses less digits than its factorization.

74398131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 920 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 74398131 is about 8625.4351194592. The cubic root of 74398131 is about 420.5852215974.

It can be divided in two parts, 74398 and 131, that added together give a square (74529 = 273²).

The spelling of 74398131 in words is "seventy-four million, three hundred ninety-eight thousand, one hundred thirty-one".