12939197 has 2 divisors, whose sum is σ = 12939198. Its totient is φ = 12939196.

The previous prime is 12939167. The next prime is 12939203. The reversal of 12939197 is 79193921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8637721 + 4301476 = 2939^2 + 2074^2 .

It is a cyclic number.

It is not a de Polignac number, because 12939197 - 2⁸ = 12938941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12939127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6469598 + 6469599.

It is an arithmetic number, because the mean of its divisors is an integer number (6469599).

Almost surely, 2^12939197 is an apocalyptic number.

It is an amenable number.

12939197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12939197 is an equidigital number, since it uses as much as digits as its factorization.

12939197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 12939197 is about 3597.1095340565. The cubic root of 12939197 is about 234.7663106214.

The spelling of 12939197 in words is "twelve million, nine hundred thirty-nine thousand, one hundred ninety-seven".