139956629 has 2 divisors, whose sum is σ = 139956630. Its totient is φ = 139956628.

The previous prime is 139956617. The next prime is 139956643. The reversal of 139956629 is 926659931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 362404 = 11815^2 + 602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139956629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139956689) 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, 69978314 + 69978315.

It is an arithmetic number, because the mean of its divisors is an integer number (69978315).

Almost surely, 2^139956629 is an apocalyptic number.

It is an amenable number.

139956629 is a deficient number, since it is larger than the sum of its proper divisors (1).

139956629 is an equidigital number, since it uses as much as digits as its factorization.

139956629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 50.

The square root of 139956629 is about 11830.3266649742. The cubic root of 139956629 is about 519.1957847277.

The spelling of 139956629 in words is "one hundred thirty-nine million, nine hundred fifty-six thousand, six hundred twenty-nine".