139733669 has 2 divisors, whose sum is σ = 139733670. Its totient is φ = 139733668.

The previous prime is 139733651. The next prime is 139733681. The reversal of 139733669 is 966337931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85784644 + 53949025 = 9262^2 + 7345^2 .

It is a cyclic number.

It is not a de Polignac number, because 139733669 - 2²⁴ = 122956453 is a prime.

It is a super-2 number, since 2×139733669² = 39050996504403122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139733369) 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, 69866834 + 69866835.

It is an arithmetic number, because the mean of its divisors is an integer number (69866835).

Almost surely, 2^139733669 is an apocalyptic number.

It is an amenable number.

139733669 is a deficient number, since it is larger than the sum of its proper divisors (1).

139733669 is an equidigital number, since it uses as much as digits as its factorization.

139733669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 47.

The square root of 139733669 is about 11820.8996696529. The cubic root of 139733669 is about 518.9199339910.

The spelling of 139733669 in words is "one hundred thirty-nine million, seven hundred thirty-three thousand, six hundred sixty-nine".