139345517 has 2 divisors, whose sum is σ = 139345518. Its totient is φ = 139345516.

The previous prime is 139345489. The next prime is 139345519. The reversal of 139345517 is 715543931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130279396 + 9066121 = 11414^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 139345517 - 2¹⁶ = 139279981 is a prime.

Together with 139345519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139345519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69672758 + 69672759.

It is an arithmetic number, because the mean of its divisors is an integer number (69672759).

Almost surely, 2^139345517 is an apocalyptic number.

It is an amenable number.

139345517 is a deficient number, since it is larger than the sum of its proper divisors (1).

139345517 is an equidigital number, since it uses as much as digits as its factorization.

139345517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 139345517 is about 11804.4702125932. The cubic root of 139345517 is about 518.4390033720.

The spelling of 139345517 in words is "one hundred thirty-nine million, three hundred forty-five thousand, five hundred seventeen".