312706969 has 2 divisors, whose sum is σ = 312706970. Its totient is φ = 312706968.

The previous prime is 312706967. The next prime is 312706981. The reversal of 312706969 is 969607213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283417225 + 29289744 = 16835^2 + 5412^2 .

It is a cyclic number.

It is not a de Polignac number, because 312706969 - 2¹ = 312706967 is a prime.

It is a super-2 number, since 2×312706969² = 195571296922333922, which contains 22 as substring.

Together with 312706967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312706963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156353484 + 156353485.

It is an arithmetic number, because the mean of its divisors is an integer number (156353485).

Almost surely, 2^312706969 is an apocalyptic number.

It is an amenable number.

312706969 is a deficient number, since it is larger than the sum of its proper divisors (1).

312706969 is an equidigital number, since it uses as much as digits as its factorization.

312706969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 312706969 is about 17683.5225280485. The cubic root of 312706969 is about 678.7541845003.

It can be divided in two parts, 312 and 706969, that added together give a 4-th power (707281 = 29⁴).

The spelling of 312706969 in words is "three hundred twelve million, seven hundred six thousand, nine hundred sixty-nine".