312122617 has 2 divisors, whose sum is σ = 312122618. Its totient is φ = 312122616.

The previous prime is 312122593. The next prime is 312122641. The reversal of 312122617 is 716221213.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (312122593) and next prime (312122641).

It can be written as a sum of positive squares in only one way, i.e., 168506361 + 143616256 = 12981^2 + 11984^2 .

It is a cyclic number.

It is not a de Polignac number, because 312122617 - 2¹¹ = 312120569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312122591 and 312122600.

It is not a weakly prime, because it can be changed into another prime (312122647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156061308 + 156061309.

It is an arithmetic number, because the mean of its divisors is an integer number (156061309).

Almost surely, 2^312122617 is an apocalyptic number.

It is an amenable number.

312122617 is a deficient number, since it is larger than the sum of its proper divisors (1).

312122617 is an equidigital number, since it uses as much as digits as its factorization.

312122617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 312122617 is about 17666.9923020304. The cubic root of 312122617 is about 678.3311274303.

The spelling of 312122617 in words is "three hundred twelve million, one hundred twenty-two thousand, six hundred seventeen".