74845991 has 8 divisors (see below), whose sum is σ = 81713664. Its totient is φ = 67988920.

The previous prime is 74845987. The next prime is 74845993. The reversal of 74845991 is 19954847.

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

It is a cyclic number.

It is not a de Polignac number, because 74845991 - 2² = 74845987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74845993) 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, 22736 + ... + 25818.

It is an arithmetic number, because the mean of its divisors is an integer number (10214208).

Almost surely, 2^74845991 is an apocalyptic number.

74845991 is a deficient number, since it is larger than the sum of its proper divisors (6867673).

74845991 is a wasteful number, since it uses less digits than its factorization.

74845991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5301.

The product of its digits is 362880, while the sum is 47.

The square root of 74845991 is about 8651.3577547111. The cubic root of 74845991 is about 421.4274765734.

The spelling of 74845991 in words is "seventy-four million, eight hundred forty-five thousand, nine hundred ninety-one".