74389831 has 4 divisors (see below), whose sum is σ = 74549592. Its totient is φ = 74230072.

The previous prime is 74389823. The next prime is 74389837. The reversal of 74389831 is 13898347.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13898347 = 37 ⋅375631.

It is a cyclic number.

It is not a de Polignac number, because 74389831 - 2³ = 74389823 is a prime.

It is a super-2 number, since 2×74389831² = 11067693912417122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74389837) 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, 79180 + ... + 80113.

It is an arithmetic number, because the mean of its divisors is an integer number (18637398).

Almost surely, 2^74389831 is an apocalyptic number.

74389831 is a deficient number, since it is larger than the sum of its proper divisors (159761).

74389831 is a wasteful number, since it uses less digits than its factorization.

74389831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159760.

The product of its digits is 145152, while the sum is 43.

The square root of 74389831 is about 8624.9539708917. The cubic root of 74389831 is about 420.5695805810.

The spelling of 74389831 in words is "seventy-four million, three hundred eighty-nine thousand, eight hundred thirty-one".