139418057 has 2 divisors, whose sum is σ = 139418058. Its totient is φ = 139418056.

The previous prime is 139418033. The next prime is 139418093. The reversal of 139418057 is 750814931.

139418057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119159056 + 20259001 = 10916^2 + 4501^2 .

It is a cyclic number.

It is not a de Polignac number, because 139418057 - 2¹⁴ = 139401673 is a prime.

It is equal to p_7881095 and since 139418057 and 7881095 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139418057.

It is not a weakly prime, because it can be changed into another prime (139418557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69709028 + 69709029.

It is an arithmetic number, because the mean of its divisors is an integer number (69709029).

Almost surely, 2^139418057 is an apocalyptic number.

It is an amenable number.

139418057 is a deficient number, since it is larger than the sum of its proper divisors (1).

139418057 is an equidigital number, since it uses as much as digits as its factorization.

139418057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 139418057 is about 11807.5423776500. The cubic root of 139418057 is about 518.5289501511.

The spelling of 139418057 in words is "one hundred thirty-nine million, four hundred eighteen thousand, fifty-seven".