50979891 has 8 divisors (see below), whose sum is σ = 70928640. Its totient is φ = 32508872.

The previous prime is 50979881. The next prime is 50979893. The reversal of 50979891 is 19897905.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50979891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50979891.

It is not an unprimeable number, because it can be changed into a prime (50979893) 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, 369351 + ... + 369488.

It is an arithmetic number, because the mean of its divisors is an integer number (8866080).

Almost surely, 2^50979891 is an apocalyptic number.

50979891 is a deficient number, since it is larger than the sum of its proper divisors (19948749).

50979891 is a wasteful number, since it uses less digits than its factorization.

50979891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738865.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 50979891 is about 7140.0203781222. The cubic root of 50979891 is about 370.7942301177.

The spelling of 50979891 in words is "fifty million, nine hundred seventy-nine thousand, eight hundred ninety-one".