139795057 has 2 divisors, whose sum is σ = 139795058. Its totient is φ = 139795056.

The previous prime is 139795043. The next prime is 139795087. The reversal of 139795057 is 750597931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139027681 + 767376 = 11791^2 + 876^2 .

It is a cyclic number.

It is not a de Polignac number, because 139795057 - 2²³ = 131406449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139794998 and 139795016.

It is not a weakly prime, because it can be changed into another prime (139795037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69897528 + 69897529.

It is an arithmetic number, because the mean of its divisors is an integer number (69897529).

Almost surely, 2^139795057 is an apocalyptic number.

It is an amenable number.

139795057 is a deficient number, since it is larger than the sum of its proper divisors (1).

139795057 is an equidigital number, since it uses as much as digits as its factorization.

139795057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 297675, while the sum is 46.

The square root of 139795057 is about 11823.4959720042. The cubic root of 139795057 is about 518.9959137539.

The spelling of 139795057 in words is "one hundred thirty-nine million, seven hundred ninety-five thousand, fifty-seven".