50878013 has 2 divisors, whose sum is σ = 50878014. Its totient is φ = 50878012.

The previous prime is 50877989. The next prime is 50878019. The reversal of 50878013 is 31087805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39601849 + 11276164 = 6293^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 50878013 - 2²⁴ = 34100797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50878019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25439006 + 25439007.

It is an arithmetic number, because the mean of its divisors is an integer number (25439007).

Almost surely, 2^50878013 is an apocalyptic number.

It is an amenable number.

50878013 is a deficient number, since it is larger than the sum of its proper divisors (1).

50878013 is an equidigital number, since it uses as much as digits as its factorization.

50878013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 50878013 is about 7132.8825169072. The cubic root of 50878013 is about 370.5470675244.

The spelling of 50878013 in words is "fifty million, eight hundred seventy-eight thousand, thirteen".