312709479479 has 4 divisors (see below), whose sum is σ = 313287501240. Its totient is φ = 312131457720.

The previous prime is 312709479457. The next prime is 312709479493. The reversal of 312709479479 is 974974907213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974974907213 = 149729 ⋅6511597.

It is a cyclic number.

It is not a de Polignac number, because 312709479479 - 2⁸ = 312709479223 is a prime.

It is a super-2 number, since 2×312709479479² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312709479679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289010069 + ... + 289011150.

It is an arithmetic number, because the mean of its divisors is an integer number (78321875310).

Almost surely, 2^312709479479 is an apocalyptic number.

312709479479 is a deficient number, since it is larger than the sum of its proper divisors (578021761).

312709479479 is an equidigital number, since it uses as much as digits as its factorization.

312709479479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578021760.

The product of its (nonzero) digits is 24004512, while the sum is 62.

The spelling of 312709479479 in words is "three hundred twelve billion, seven hundred nine million, four hundred seventy-nine thousand, four hundred seventy-nine".