74999391 has 8 divisors (see below), whose sum is σ = 100167984. Its totient is φ = 49915200.

The previous prime is 74999387. The next prime is 74999401. The reversal of 74999391 is 19399947.

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

It is not a de Polignac number, because 74999391 - 2² = 74999387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74999311) 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, 18996 + ... + 22601.

It is an arithmetic number, because the mean of its divisors is an integer number (12520998).

Almost surely, 2^74999391 is an apocalyptic number.

74999391 is a deficient number, since it is larger than the sum of its proper divisors (25168593).

74999391 is a wasteful number, since it uses less digits than its factorization.

74999391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42201.

The product of its digits is 551124, while the sum is 51.

The square root of 74999391 is about 8660.2188771416. The cubic root of 74999391 is about 421.7151912022.

The spelling of 74999391 in words is "seventy-four million, nine hundred ninety-nine thousand, three hundred ninety-one".