312745997 has 2 divisors, whose sum is σ = 312745998. Its totient is φ = 312745996.

The previous prime is 312745967. The next prime is 312746003. The reversal of 312745997 is 799547213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307967401 + 4778596 = 17549^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 312745997 - 2⁶ = 312745933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312745967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156372998 + 156372999.

It is an arithmetic number, because the mean of its divisors is an integer number (156372999).

Almost surely, 2^312745997 is an apocalyptic number.

It is an amenable number.

312745997 is a deficient number, since it is larger than the sum of its proper divisors (1).

312745997 is an equidigital number, since it uses as much as digits as its factorization.

312745997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 312745997 is about 17684.6260067891. The cubic root of 312745997 is about 678.7824210699.

The spelling of 312745997 in words is "three hundred twelve million, seven hundred forty-five thousand, nine hundred ninety-seven".