50787917 has 2 divisors, whose sum is σ = 50787918. Its totient is φ = 50787916.

The previous prime is 50787883. The next prime is 50787953. The reversal of 50787917 is 71978705.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50495236 + 292681 = 7106^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 50787917 - 2⁸ = 50787661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50787977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25393958 + 25393959.

It is an arithmetic number, because the mean of its divisors is an integer number (25393959).

Almost surely, 2^50787917 is an apocalyptic number.

It is an amenable number.

50787917 is a deficient number, since it is larger than the sum of its proper divisors (1).

50787917 is an equidigital number, since it uses as much as digits as its factorization.

50787917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 50787917 is about 7126.5641791820. The cubic root of 50787917 is about 370.3282137587.

The spelling of 50787917 in words is "fifty million, seven hundred eighty-seven thousand, nine hundred seventeen".