139297 has 2 divisors, whose sum is σ = 139298. Its totient is φ = 139296.

The previous prime is 139291. The next prime is 139301. The reversal of 139297 is 792931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136161 + 3136 = 369^2 + 56^2 .

It is a cyclic number.

It is not a de Polignac number, because 139297 - 2⁷ = 139169 is a prime.

It is not a weakly prime, because it can be changed into another prime (139291) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69648 + 69649.

It is an arithmetic number, because the mean of its divisors is an integer number (69649).

2¹³⁹²⁹⁷ is an apocalyptic number.

It is an amenable number.

139297 is a deficient number, since it is larger than the sum of its proper divisors (1).

139297 is an equidigital number, since it uses as much as digits as its factorization.

139297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 31.

The square root of 139297 is about 373.2251331301. The cubic root of 139297 is about 51.8378826756.

The spelling of 139297 in words is "one hundred thirty-nine thousand, two hundred ninety-seven".