139317889 has 2 divisors, whose sum is σ = 139317890. Its totient is φ = 139317888.

The previous prime is 139317869. The next prime is 139317911. The reversal of 139317889 is 988713931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108847489 + 30470400 = 10433^2 + 5520^2 .

It is a cyclic number.

It is not a de Polignac number, because 139317889 - 2²⁵ = 105763457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139317869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69658944 + 69658945.

It is an arithmetic number, because the mean of its divisors is an integer number (69658945).

Almost surely, 2^139317889 is an apocalyptic number.

It is an amenable number.

139317889 is a deficient number, since it is larger than the sum of its proper divisors (1).

139317889 is an equidigital number, since it uses as much as digits as its factorization.

139317889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 139317889 is about 11803.2999199376. The cubic root of 139317889 is about 518.4047375178.

The spelling of 139317889 in words is "one hundred thirty-nine million, three hundred seventeen thousand, eight hundred eighty-nine".