139306913 has 2 divisors, whose sum is σ = 139306914. Its totient is φ = 139306912.

The previous prime is 139306907. The next prime is 139306927. The reversal of 139306913 is 319603931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137545984 + 1760929 = 11728^2 + 1327^2 .

It is a cyclic number.

It is not a de Polignac number, because 139306913 - 2²² = 135112609 is a prime.

It is equal to p_7875125 and since 139306913 and 7875125 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (139305913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69653456 + 69653457.

It is an arithmetic number, because the mean of its divisors is an integer number (69653457).

Almost surely, 2^139306913 is an apocalyptic number.

It is an amenable number.

139306913 is a deficient number, since it is larger than the sum of its proper divisors (1).

139306913 is an equidigital number, since it uses as much as digits as its factorization.

139306913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 139306913 is about 11802.8349560603. The cubic root of 139306913 is about 518.3911231861.

The spelling of 139306913 in words is "one hundred thirty-nine million, three hundred six thousand, nine hundred thirteen".