50877989 has 2 divisors, whose sum is σ = 50877990. Its totient is φ = 50877988.

The previous prime is 50877979. The next prime is 50878013. The reversal of 50877989 is 98977805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49589764 + 1288225 = 7042^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 50877989 - 2⁴ = 50877973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50877989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50877929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25438994 + 25438995.

It is an arithmetic number, because the mean of its divisors is an integer number (25438995).

Almost surely, 2^50877989 is an apocalyptic number.

It is an amenable number.

50877989 is a deficient number, since it is larger than the sum of its proper divisors (1).

50877989 is an equidigital number, since it uses as much as digits as its factorization.

50877989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 50877989 is about 7132.8808345577. The cubic root of 50877989 is about 370.5470092600.

The spelling of 50877989 in words is "fifty million, eight hundred seventy-seven thousand, nine hundred eighty-nine".