139525957 has 2 divisors, whose sum is σ = 139525958. Its totient is φ = 139525956.

The previous prime is 139525933. The next prime is 139525979. The reversal of 139525957 is 759525931.

139525957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98386561 + 41139396 = 9919^2 + 6414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139525957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139525907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69762978 + 69762979.

It is an arithmetic number, because the mean of its divisors is an integer number (69762979).

Almost surely, 2^139525957 is an apocalyptic number.

It is an amenable number.

139525957 is a deficient number, since it is larger than the sum of its proper divisors (1).

139525957 is an equidigital number, since it uses as much as digits as its factorization.

139525957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 425250, while the sum is 46.

The square root of 139525957 is about 11812.1106073386. The cubic root of 139525957 is about 518.6626842539.

The spelling of 139525957 in words is "one hundred thirty-nine million, five hundred twenty-five thousand, nine hundred fifty-seven".