312661837 has 2 divisors, whose sum is σ = 312661838. Its totient is φ = 312661836.

The previous prime is 312661829. The next prime is 312661849. The reversal of 312661837 is 738166213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286997481 + 25664356 = 16941^2 + 5066^2 .

It is an emirp because it is prime and its reverse (738166213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312661837 - 2³ = 312661829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312661796 and 312661805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312661337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156330918 + 156330919.

It is an arithmetic number, because the mean of its divisors is an integer number (156330919).

Almost surely, 2^312661837 is an apocalyptic number.

It is an amenable number.

312661837 is a deficient number, since it is larger than the sum of its proper divisors (1).

312661837 is an equidigital number, since it uses as much as digits as its factorization.

312661837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 312661837 is about 17682.2463787834. The cubic root of 312661837 is about 678.7215287866.

The spelling of 312661837 in words is "three hundred twelve million, six hundred sixty-one thousand, eight hundred thirty-seven".