139609319 has 2 divisors, whose sum is σ = 139609320. Its totient is φ = 139609318.

The previous prime is 139609303. The next prime is 139609331. The reversal of 139609319 is 913906931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139609319 - 2⁴ = 139609303 is a prime.

It is a super-2 number, since 2×139609319² = 38981523903287522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139609619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69804659 + 69804660.

It is an arithmetic number, because the mean of its divisors is an integer number (69804660).

Almost surely, 2^139609319 is an apocalyptic number.

139609319 is a deficient number, since it is larger than the sum of its proper divisors (1).

139609319 is an equidigital number, since it uses as much as digits as its factorization.

139609319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 139609319 is about 11815.6387470166. The cubic root of 139609319 is about 518.7659581097.

The spelling of 139609319 in words is "one hundred thirty-nine million, six hundred nine thousand, three hundred nineteen".