139577569 has 2 divisors, whose sum is σ = 139577570. Its totient is φ = 139577568.

The previous prime is 139577521. The next prime is 139577573. The reversal of 139577569 is 965775931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129686544 + 9891025 = 11388^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 139577569 - 2²³ = 131188961 is a prime.

It is a super-2 number, since 2×139577569² = 38963795535899522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139577069) 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, 69788784 + 69788785.

It is an arithmetic number, because the mean of its divisors is an integer number (69788785).

Almost surely, 2^139577569 is an apocalyptic number.

It is an amenable number.

139577569 is a deficient number, since it is larger than the sum of its proper divisors (1).

139577569 is an equidigital number, since it uses as much as digits as its factorization.

139577569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1786050, while the sum is 52.

The square root of 139577569 is about 11814.2951122782. The cubic root of 139577569 is about 518.7266291498.

The spelling of 139577569 in words is "one hundred thirty-nine million, five hundred seventy-seven thousand, five hundred sixty-nine".