312122893 has 2 divisors, whose sum is σ = 312122894. Its totient is φ = 312122892.

The previous prime is 312122891. The next prime is 312122897. The reversal of 312122893 is 398221213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312122889 + 4 = 17667^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 312122893 - 2¹ = 312122891 is a prime.

Together with 312122891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312122891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156061446 + 156061447.

It is an arithmetic number, because the mean of its divisors is an integer number (156061447).

Almost surely, 2^312122893 is an apocalyptic number.

It is an amenable number.

312122893 is a deficient number, since it is larger than the sum of its proper divisors (1).

312122893 is an equidigital number, since it uses as much as digits as its factorization.

312122893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 312122893 is about 17667.0001132054. Note that the first 3 decimals coincide. The cubic root of 312122893 is about 678.3313273724.

The spelling of 312122893 in words is "three hundred twelve million, one hundred twenty-two thousand, eight hundred ninety-three".