312500017 has 2 divisors, whose sum is σ = 312500018. Its totient is φ = 312500016.

The previous prime is 312499987. The next prime is 312500059. The reversal of 312500017 is 710005213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268992801 + 43507216 = 16401^2 + 6596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312500017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312499967 and 312500003.

It is not a weakly prime, because it can be changed into another prime (312500077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156250008 + 156250009.

It is an arithmetic number, because the mean of its divisors is an integer number (156250009).

Almost surely, 2^312500017 is an apocalyptic number.

It is an amenable number.

312500017 is a deficient number, since it is larger than the sum of its proper divisors (1).

312500017 is an equidigital number, since it uses as much as digits as its factorization.

312500017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 312500017 is about 17677.6700104963. The cubic root of 312500017 is about 678.6044164541.

The spelling of 312500017 in words is "three hundred twelve million, five hundred thousand, seventeen".