139432297 has 2 divisors, whose sum is σ = 139432298. Its totient is φ = 139432296.

The previous prime is 139432289. The next prime is 139432309. The reversal of 139432297 is 792234931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137804121 + 1628176 = 11739^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 139432297 - 2³ = 139432289 is a prime.

It is not a weakly prime, because it can be changed into another prime (139432207) 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, 69716148 + 69716149.

It is an arithmetic number, because the mean of its divisors is an integer number (69716149).

Almost surely, 2^139432297 is an apocalyptic number.

It is an amenable number.

139432297 is a deficient number, since it is larger than the sum of its proper divisors (1).

139432297 is an equidigital number, since it uses as much as digits as its factorization.

139432297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 139432297 is about 11808.1453666526. The cubic root of 139432297 is about 518.5466035336.

The spelling of 139432297 in words is "one hundred thirty-nine million, four hundred thirty-two thousand, two hundred ninety-seven".