139850957 has 2 divisors, whose sum is σ = 139850958. Its totient is φ = 139850956.

The previous prime is 139850939. The next prime is 139850981. The reversal of 139850957 is 759058931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91604041 + 48246916 = 9571^2 + 6946^2 .

It is a cyclic number.

It is not a de Polignac number, because 139850957 - 2⁸ = 139850701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139850927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69925478 + 69925479.

It is an arithmetic number, because the mean of its divisors is an integer number (69925479).

Almost surely, 2^139850957 is an apocalyptic number.

It is an amenable number.

139850957 is a deficient number, since it is larger than the sum of its proper divisors (1).

139850957 is an equidigital number, since it uses as much as digits as its factorization.

139850957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 139850957 is about 11825.8596727680. The cubic root of 139850957 is about 519.0650816870.

The spelling of 139850957 in words is "one hundred thirty-nine million, eight hundred fifty thousand, nine hundred fifty-seven".