312505469 has 2 divisors, whose sum is σ = 312505470. Its totient is φ = 312505468.

The previous prime is 312505463. The next prime is 312505489. The reversal of 312505469 is 964505213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273505444 + 39000025 = 16538^2 + 6245^2 .

It is a cyclic number.

It is not a de Polignac number, because 312505469 - 2⁸ = 312505213 is a prime.

It is a super-2 number, since 2×312505469² = 195319336309819922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312505463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156252734 + 156252735.

It is an arithmetic number, because the mean of its divisors is an integer number (156252735).

Almost surely, 2^312505469 is an apocalyptic number.

It is an amenable number.

312505469 is a deficient number, since it is larger than the sum of its proper divisors (1).

312505469 is an equidigital number, since it uses as much as digits as its factorization.

312505469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 312505469 is about 17677.8242156664. The cubic root of 312505469 is about 678.6083628323.

The spelling of 312505469 in words is "three hundred twelve million, five hundred five thousand, four hundred sixty-nine".