139657607 has 2 divisors, whose sum is σ = 139657608. Its totient is φ = 139657606.

The previous prime is 139657579. The next prime is 139657621. The reversal of 139657607 is 706756931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139657607 - 2¹⁸ = 139395463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139657807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69828803 + 69828804.

It is an arithmetic number, because the mean of its divisors is an integer number (69828804).

Almost surely, 2^139657607 is an apocalyptic number.

139657607 is a deficient number, since it is larger than the sum of its proper divisors (1).

139657607 is an equidigital number, since it uses as much as digits as its factorization.

139657607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 139657607 is about 11817.6819639048. The cubic root of 139657607 is about 518.8257613836.

The spelling of 139657607 in words is "one hundred thirty-nine million, six hundred fifty-seven thousand, six hundred seven".