50990391 has 12 divisors (see below), whose sum is σ = 76381032. Its totient is φ = 33993432.

The previous prime is 50990369. The next prime is 50990393. The reversal of 50990391 is 19309905.

It is not a de Polignac number, because 50990391 - 2⁷ = 50990263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50990393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104676 + ... + 105161.

It is an arithmetic number, because the mean of its divisors is an integer number (6365086).

Almost surely, 2^50990391 is an apocalyptic number.

50990391 is a deficient number, since it is larger than the sum of its proper divisors (25390641).

50990391 is an equidigital number, since it uses as much as digits as its factorization.

50990391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209852 (or 209840 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 50990391 is about 7140.7556322843. The cubic root of 50990391 is about 370.8196850705.

The spelling of 50990391 in words is "fifty million, nine hundred ninety thousand, three hundred ninety-one".