139259557 has 2 divisors, whose sum is σ = 139259558. Its totient is φ = 139259556.

The previous prime is 139259509. The next prime is 139259573. The reversal of 139259557 is 755952931.

139259557 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., 113188321 + 26071236 = 10639^2 + 5106^2 .

It is a cyclic number.

It is not a de Polignac number, because 139259557 - 2¹¹ = 139257509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139259587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69629778 + 69629779.

It is an arithmetic number, because the mean of its divisors is an integer number (69629779).

Almost surely, 2^139259557 is an apocalyptic number.

It is an amenable number.

139259557 is a deficient number, since it is larger than the sum of its proper divisors (1).

139259557 is an equidigital number, since it uses as much as digits as its factorization.

139259557 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 139259557 is about 11800.8286573444. The cubic root of 139259557 is about 518.3323758927.

The spelling of 139259557 in words is "one hundred thirty-nine million, two hundred fifty-nine thousand, five hundred fifty-seven".