50137921 has 2 divisors, whose sum is σ = 50137922. Its totient is φ = 50137920.

The previous prime is 50137847. The next prime is 50137931. The reversal of 50137921 is 12973105.

50137921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36180225 + 13957696 = 6015^2 + 3736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50137921 is a prime.

It is a super-2 number, since 2×50137921² = 5027622244404482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 50137921.

It is not a weakly prime, because it can be changed into another prime (50137931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25068960 + 25068961.

It is an arithmetic number, because the mean of its divisors is an integer number (25068961).

Almost surely, 2^50137921 is an apocalyptic number.

It is an amenable number.

50137921 is a deficient number, since it is larger than the sum of its proper divisors (1).

50137921 is an equidigital number, since it uses as much as digits as its factorization.

50137921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 50137921 is about 7080.8135831979. The cubic root of 50137921 is about 368.7415757532.

The spelling of 50137921 in words is "fifty million, one hundred thirty-seven thousand, nine hundred twenty-one".