312433987 has 2 divisors, whose sum is σ = 312433988. Its totient is φ = 312433986.

The previous prime is 312433963. The next prime is 312434029. The reversal of 312433987 is 789334213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312433987 - 2¹⁹ = 311909699 is a prime.

It is a super-2 number, since 2×312433987² = 195229992465432338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312433087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156216993 + 156216994.

It is an arithmetic number, because the mean of its divisors is an integer number (156216994).

Almost surely, 2^312433987 is an apocalyptic number.

312433987 is a deficient number, since it is larger than the sum of its proper divisors (1).

312433987 is an equidigital number, since it uses as much as digits as its factorization.

312433987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 312433987 is about 17675.8023014516. The cubic root of 312433987 is about 678.5566176237.

The spelling of 312433987 in words is "three hundred twelve million, four hundred thirty-three thousand, nine hundred eighty-seven".