139375813 has 2 divisors, whose sum is σ = 139375814. Its totient is φ = 139375812.

The previous prime is 139375801. The next prime is 139375823. The reversal of 139375813 is 318573931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137780644 + 1595169 = 11738^2 + 1263^2 .

It is a cyclic number.

It is not a de Polignac number, because 139375813 - 2¹⁷ = 139244741 is a prime.

It is equal to p_7878811 and since 139375813 and 7878811 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139375823) 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, 69687906 + 69687907.

It is an arithmetic number, because the mean of its divisors is an integer number (69687907).

Almost surely, 2^139375813 is an apocalyptic number.

It is an amenable number.

139375813 is a deficient number, since it is larger than the sum of its proper divisors (1).

139375813 is an equidigital number, since it uses as much as digits as its factorization.

139375813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 139375813 is about 11805.7533855320. The cubic root of 139375813 is about 518.4765730291.

The spelling of 139375813 in words is "one hundred thirty-nine million, three hundred seventy-five thousand, eight hundred thirteen".