312243293 has 2 divisors, whose sum is σ = 312243294. Its totient is φ = 312243292.

The previous prime is 312243277. The next prime is 312243307. The reversal of 312243293 is 392342213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247810564 + 64432729 = 15742^2 + 8027^2 .

It is an emirp because it is prime and its reverse (392342213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312243293 - 2⁴ = 312243277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312243793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156121646 + 156121647.

It is an arithmetic number, because the mean of its divisors is an integer number (156121647).

Almost surely, 2^312243293 is an apocalyptic number.

It is an amenable number.

312243293 is a deficient number, since it is larger than the sum of its proper divisors (1).

312243293 is an equidigital number, since it uses as much as digits as its factorization.

312243293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

The square root of 312243293 is about 17670.4072675193. The cubic root of 312243293 is about 678.4185372444.

The spelling of 312243293 in words is "three hundred twelve million, two hundred forty-three thousand, two hundred ninety-three".