50139247013 has 2 divisors, whose sum is σ = 50139247014. Its totient is φ = 50139247012.

The previous prime is 50139246991. The next prime is 50139247019. The reversal of 50139247013 is 31074293105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49114094689 + 1025152324 = 221617^2 + 32018^2 .

It is a cyclic number.

It is not a de Polignac number, because 50139247013 - 2¹² = 50139242917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50139247019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25069623506 + 25069623507.

It is an arithmetic number, because the mean of its divisors is an integer number (25069623507).

Almost surely, 2^50139247013 is an apocalyptic number.

It is an amenable number.

50139247013 is a deficient number, since it is larger than the sum of its proper divisors (1).

50139247013 is an equidigital number, since it uses as much as digits as its factorization.

50139247013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 50139247013 in words is "fifty billion, one hundred thirty-nine million, two hundred forty-seven thousand, thirteen".