50400139 has 2 divisors, whose sum is σ = 50400140. Its totient is φ = 50400138.

The previous prime is 50400127. The next prime is 50400167. The reversal of 50400139 is 93100405.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50400139 - 2⁹ = 50399627 is a prime.

It is a super-2 number, since 2×50400139² = 5080348022438642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50400169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25200069 + 25200070.

It is an arithmetic number, because the mean of its divisors is an integer number (25200070).

Almost surely, 2^50400139 is an apocalyptic number.

50400139 is a deficient number, since it is larger than the sum of its proper divisors (1).

50400139 is an equidigital number, since it uses as much as digits as its factorization.

50400139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 50400139 is about 7099.3055294162. The cubic root of 50400139 is about 369.3832896675.

The spelling of 50400139 in words is "fifty million, four hundred thousand, one hundred thirty-nine".