74763991 has 4 divisors (see below), whose sum is σ = 74786400. Its totient is φ = 74741584.

The previous prime is 74763989. The next prime is 74764009. The reversal of 74763991 is 19936747.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74763991 - 2¹ = 74763989 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 (74763911) 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, 5086 + ... + 13243.

It is an arithmetic number, because the mean of its divisors is an integer number (18696600).

Almost surely, 2^74763991 is an apocalyptic number.

74763991 is a deficient number, since it is larger than the sum of its proper divisors (22409).

74763991 is a wasteful number, since it uses less digits than its factorization.

74763991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22408.

The product of its digits is 285768, while the sum is 46.

The square root of 74763991 is about 8646.6173154593. The cubic root of 74763991 is about 421.2735173996.

The spelling of 74763991 in words is "seventy-four million, seven hundred sixty-three thousand, nine hundred ninety-one".