139824169 has 2 divisors, whose sum is σ = 139824170. Its totient is φ = 139824168.

The previous prime is 139824151. The next prime is 139824197. The reversal of 139824169 is 961428931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137827600 + 1996569 = 11740^2 + 1413^2 .

It is a cyclic number.

It is not a de Polignac number, because 139824169 - 2²⁷ = 5606441 is a prime.

It is a super-2 number, since 2×139824169² = 39101596473081122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139824149) 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, 69912084 + 69912085.

It is an arithmetic number, because the mean of its divisors is an integer number (69912085).

Almost surely, 2^139824169 is an apocalyptic number.

It is an amenable number.

139824169 is a deficient number, since it is larger than the sum of its proper divisors (1).

139824169 is an equidigital number, since it uses as much as digits as its factorization.

139824169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 139824169 is about 11824.7270158765. The cubic root of 139824169 is about 519.0319378230.

The spelling of 139824169 in words is "one hundred thirty-nine million, eight hundred twenty-four thousand, one hundred sixty-nine".