50017931 has 2 divisors, whose sum is σ = 50017932. Its totient is φ = 50017930.

The previous prime is 50017907. The next prime is 50017943. The reversal of 50017931 is 13971005.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50017931 is a prime.

It is a super-2 number, since 2×50017931² = 5003586843041522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50017931.

It is not a weakly prime, because it can be changed into another prime (50017631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25008965 + 25008966.

It is an arithmetic number, because the mean of its divisors is an integer number (25008966).

Almost surely, 2^50017931 is an apocalyptic number.

50017931 is a deficient number, since it is larger than the sum of its proper divisors (1).

50017931 is an equidigital number, since it uses as much as digits as its factorization.

50017931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 50017931 is about 7072.3356113804. The cubic root of 50017931 is about 368.4471835132.

Adding to 50017931 its reverse (13971005), we get a palindrome (63988936).

The spelling of 50017931 in words is "fifty million, seventeen thousand, nine hundred thirty-one".