139279297 has 2 divisors, whose sum is σ = 139279298. Its totient is φ = 139279296.

The previous prime is 139279289. The next prime is 139279321. The reversal of 139279297 is 792972931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127780416 + 11498881 = 11304^2 + 3391^2 .

It is a cyclic number.

It is not a de Polignac number, because 139279297 - 2³ = 139279289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139279297.

It is not a weakly prime, because it can be changed into another prime (139279247) 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, 69639648 + 69639649.

It is an arithmetic number, because the mean of its divisors is an integer number (69639649).

Almost surely, 2^139279297 is an apocalyptic number.

It is an amenable number.

139279297 is a deficient number, since it is larger than the sum of its proper divisors (1).

139279297 is an equidigital number, since it uses as much as digits as its factorization.

139279297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 49.

The square root of 139279297 is about 11801.6650096501. The cubic root of 139279297 is about 518.3568658880.

The spelling of 139279297 in words is "one hundred thirty-nine million, two hundred seventy-nine thousand, two hundred ninety-seven".