312771421 has 2 divisors, whose sum is σ = 312771422. Its totient is φ = 312771420.

The previous prime is 312771383. The next prime is 312771451. The reversal of 312771421 is 124177213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263575225 + 49196196 = 16235^2 + 7014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312771421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312771421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312771451) 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, 156385710 + 156385711.

It is an arithmetic number, because the mean of its divisors is an integer number (156385711).

Almost surely, 2^312771421 is an apocalyptic number.

It is an amenable number.

312771421 is a deficient number, since it is larger than the sum of its proper divisors (1).

312771421 is an equidigital number, since it uses as much as digits as its factorization.

312771421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 28.

The square root of 312771421 is about 17685.3448086262. The cubic root of 312771421 is about 678.8008139477.

The spelling of 312771421 in words is "three hundred twelve million, seven hundred seventy-one thousand, four hundred twenty-one".