50931997 has 2 divisors, whose sum is σ = 50931998. Its totient is φ = 50931996.

The previous prime is 50931961. The next prime is 50932019. The reversal of 50931997 is 79913905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40081561 + 10850436 = 6331^2 + 3294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50931997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50931197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25465998 + 25465999.

It is an arithmetic number, because the mean of its divisors is an integer number (25465999).

Almost surely, 2^50931997 is an apocalyptic number.

It is an amenable number.

50931997 is a deficient number, since it is larger than the sum of its proper divisors (1).

50931997 is an equidigital number, since it uses as much as digits as its factorization.

50931997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 50931997 is about 7136.6656780320. The cubic root of 50931997 is about 370.6780772406.

The spelling of 50931997 in words is "fifty million, nine hundred thirty-one thousand, nine hundred ninety-seven".