312293999 has 2 divisors, whose sum is σ = 312294000. Its totient is φ = 312293998.

The previous prime is 312293983. The next prime is 312294001. The reversal of 312293999 is 999392213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312293999 - 2⁴ = 312293983 is a prime.

It is a super-2 number, since 2×312293999² = 195055083622824002, which contains 22 as substring.

Together with 312294001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312293909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156146999 + 156147000.

It is an arithmetic number, because the mean of its divisors is an integer number (156147000).

Almost surely, 2^312293999 is an apocalyptic number.

312293999 is a deficient number, since it is larger than the sum of its proper divisors (1).

312293999 is an equidigital number, since it uses as much as digits as its factorization.

312293999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 47.

The square root of 312293999 is about 17671.8419809594. The cubic root of 312293999 is about 678.4552586399.

The spelling of 312293999 in words is "three hundred twelve million, two hundred ninety-three thousand, nine hundred ninety-nine".