139713397 has 2 divisors, whose sum is σ = 139713398. Its totient is φ = 139713396.

The previous prime is 139713389. The next prime is 139713419. The reversal of 139713397 is 793317931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138438756 + 1274641 = 11766^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 139713397 - 2³ = 139713389 is a prime.

It is equal to p_7896850 and since 139713397 and 7896850 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139713307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69856698 + 69856699.

It is an arithmetic number, because the mean of its divisors is an integer number (69856699).

Almost surely, 2^139713397 is an apocalyptic number.

It is an amenable number.

139713397 is a deficient number, since it is larger than the sum of its proper divisors (1).

139713397 is an equidigital number, since it uses as much as digits as its factorization.

139713397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107163, while the sum is 43.

The square root of 139713397 is about 11820.0421742056. The cubic root of 139713397 is about 518.8948385035.

The spelling of 139713397 in words is "one hundred thirty-nine million, seven hundred thirteen thousand, three hundred ninety-seven".