139275569 has 2 divisors, whose sum is σ = 139275570. Its totient is φ = 139275568.

The previous prime is 139275559. The next prime is 139275571. The reversal of 139275569 is 965572931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136585969 + 2689600 = 11687^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 139275569 - 2¹⁶ = 139210033 is a prime.

It is a super-2 number, since 2×139275569² = 38795368240547522, which contains 22 as substring.

Together with 139275571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139275559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69637784 + 69637785.

It is an arithmetic number, because the mean of its divisors is an integer number (69637785).

Almost surely, 2^139275569 is an apocalyptic number.

It is an amenable number.

139275569 is a deficient number, since it is larger than the sum of its proper divisors (1).

139275569 is an equidigital number, since it uses as much as digits as its factorization.

139275569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 47.

The square root of 139275569 is about 11801.5070647778. The cubic root of 139275569 is about 518.3522410043.

The spelling of 139275569 in words is "one hundred thirty-nine million, two hundred seventy-five thousand, five hundred sixty-nine".