312342757 has 2 divisors, whose sum is σ = 312342758. Its totient is φ = 312342756.

The previous prime is 312342749. The next prime is 312342769. The reversal of 312342757 is 757243213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217592001 + 94750756 = 14751^2 + 9734^2 .

It is an emirp because it is prime and its reverse (757243213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312342757 - 2³ = 312342749 is a prime.

It is a super-2 number, since 2×312342757² = 195115995700722098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312342787) 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, 156171378 + 156171379.

It is an arithmetic number, because the mean of its divisors is an integer number (156171379).

Almost surely, 2^312342757 is an apocalyptic number.

It is an amenable number.

312342757 is a deficient number, since it is larger than the sum of its proper divisors (1).

312342757 is an equidigital number, since it uses as much as digits as its factorization.

312342757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 34.

The square root of 312342757 is about 17673.2214663881. The cubic root of 312342757 is about 678.4905655411.

The spelling of 312342757 in words is "three hundred twelve million, three hundred forty-two thousand, seven hundred fifty-seven".