312249199 has 2 divisors, whose sum is σ = 312249200. Its totient is φ = 312249198.

The previous prime is 312249193. The next prime is 312249227. The reversal of 312249199 is 991942213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312249199 - 2⁹ = 312248687 is a prime.

It is a super-2 number, since 2×312249199² = 194999124552283202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312249193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156124599 + 156124600.

It is an arithmetic number, because the mean of its divisors is an integer number (156124600).

Almost surely, 2^312249199 is an apocalyptic number.

312249199 is a deficient number, since it is larger than the sum of its proper divisors (1).

312249199 is an equidigital number, since it uses as much as digits as its factorization.

312249199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 312249199 is about 17670.5743822888. The cubic root of 312249199 is about 678.4228145870.

The spelling of 312249199 in words is "three hundred twelve million, two hundred forty-nine thousand, one hundred ninety-nine".