50816639 has 2 divisors, whose sum is σ = 50816640. Its totient is φ = 50816638.

The previous prime is 50816627. The next prime is 50816677. The reversal of 50816639 is 93661805.

It is an a-pointer prime, because the next prime (50816677) can be obtained adding 50816639 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50816639 - 2²⁰ = 49768063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50816609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25408319 + 25408320.

It is an arithmetic number, because the mean of its divisors is an integer number (25408320).

Almost surely, 2^50816639 is an apocalyptic number.

50816639 is a deficient number, since it is larger than the sum of its proper divisors (1).

50816639 is an equidigital number, since it uses as much as digits as its factorization.

50816639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 50816639 is about 7128.5790309149. The cubic root of 50816639 is about 370.3980109541.

The spelling of 50816639 in words is "fifty million, eight hundred sixteen thousand, six hundred thirty-nine".