312131029289197 has 2 divisors, whose sum is σ = 312131029289198. Its totient is φ = 312131029289196.

The previous prime is 312131029289173. The next prime is 312131029289231. The reversal of 312131029289197 is 791982920131213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306106306859236 + 6024722429961 = 17495894^2 + 2454531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312131029289197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312131029289797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156065514644598 + 156065514644599.

It is an arithmetic number, because the mean of its divisors is an integer number (156065514644599).

Almost surely, 2^{312131029289197} is an apocalyptic number.

It is an amenable number.

312131029289197 is a deficient number, since it is larger than the sum of its proper divisors (1).

312131029289197 is an equidigital number, since it uses as much as digits as its factorization.

312131029289197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 58.

The spelling of 312131029289197 in words is "three hundred twelve trillion, one hundred thirty-one billion, twenty-nine million, two hundred eighty-nine thousand, one hundred ninety-seven".