312399743 has 2 divisors, whose sum is σ = 312399744. Its totient is φ = 312399742.

The previous prime is 312399713. The next prime is 312399751. The reversal of 312399743 is 347993213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312399743 - 2¹² = 312395647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312399743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312399713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156199871 + 156199872.

It is an arithmetic number, because the mean of its divisors is an integer number (156199872).

Almost surely, 2^312399743 is an apocalyptic number.

312399743 is a deficient number, since it is larger than the sum of its proper divisors (1).

312399743 is an equidigital number, since it uses as much as digits as its factorization.

312399743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 41.

The square root of 312399743 is about 17674.8336060060. The cubic root of 312399743 is about 678.5318258887.

The spelling of 312399743 in words is "three hundred twelve million, three hundred ninety-nine thousand, seven hundred forty-three".