139222957 has 2 divisors, whose sum is σ = 139222958. Its totient is φ = 139222956.

The previous prime is 139222931. The next prime is 139223017. The reversal of 139222957 is 759222931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106378596 + 32844361 = 10314^2 + 5731^2 .

It is a cyclic number.

It is not a de Polignac number, because 139222957 - 2¹⁹ = 138698669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139222907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69611478 + 69611479.

It is an arithmetic number, because the mean of its divisors is an integer number (69611479).

Almost surely, 2^139222957 is an apocalyptic number.

It is an amenable number.

139222957 is a deficient number, since it is larger than the sum of its proper divisors (1).

139222957 is an equidigital number, since it uses as much as digits as its factorization.

139222957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 139222957 is about 11799.2778168835. The cubic root of 139222957 is about 518.2869627865.

The spelling of 139222957 in words is "one hundred thirty-nine million, two hundred twenty-two thousand, nine hundred fifty-seven".