139692529 has 2 divisors, whose sum is σ = 139692530. Its totient is φ = 139692528.

The previous prime is 139692523. The next prime is 139692533. The reversal of 139692529 is 925296931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138015504 + 1677025 = 11748^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 139692529 - 2⁷ = 139692401 is a prime.

It is not a weakly prime, because it can be changed into another prime (139692523) 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, 69846264 + 69846265.

It is an arithmetic number, because the mean of its divisors is an integer number (69846265).

Almost surely, 2^139692529 is an apocalyptic number.

It is an amenable number.

139692529 is a deficient number, since it is larger than the sum of its proper divisors (1).

139692529 is an equidigital number, since it uses as much as digits as its factorization.

139692529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 46.

The square root of 139692529 is about 11819.1594032740. The cubic root of 139692529 is about 518.8690026689.

The spelling of 139692529 in words is "one hundred thirty-nine million, six hundred ninety-two thousand, five hundred twenty-nine".