312240739 has 2 divisors, whose sum is σ = 312240740. Its totient is φ = 312240738.

The previous prime is 312240713. The next prime is 312240749. The reversal of 312240739 is 937042213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312240739 - 2¹⁷ = 312109667 is a prime.

It is a super-2 number, since 2×312240739² = 194988558182532242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312240739.

It is not a weakly prime, because it can be changed into another prime (312240749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156120369 + 156120370.

It is an arithmetic number, because the mean of its divisors is an integer number (156120370).

Almost surely, 2^312240739 is an apocalyptic number.

312240739 is a deficient number, since it is larger than the sum of its proper divisors (1).

312240739 is an equidigital number, since it uses as much as digits as its factorization.

312240739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 312240739 is about 17670.3349996541. The cubic root of 312240739 is about 678.4166875269.

The spelling of 312240739 in words is "three hundred twelve million, two hundred forty thousand, seven hundred thirty-nine".