312179860849 has 4 divisors (see below), whose sum is σ = 314168267764. Its totient is φ = 310191453936.

The previous prime is 312179860831. The next prime is 312179860871. The reversal of 312179860849 is 948068971213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113749703824 + 198430157025 = 337268^2 + 445455^2 .

It is a cyclic number.

It is not a de Polignac number, because 312179860849 - 2¹³ = 312179852657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312179860793 and 312179860802.

It is not an unprimeable number, because it can be changed into a prime (312179860819) 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, 994203222 + ... + 994203535.

It is an arithmetic number, because the mean of its divisors is an integer number (78542066941).

Almost surely, 2^312179860849 is an apocalyptic number.

It is an amenable number.

312179860849 is a deficient number, since it is larger than the sum of its proper divisors (1988406915).

312179860849 is a wasteful number, since it uses less digits than its factorization.

312179860849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988406914.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 312179860849 in words is "three hundred twelve billion, one hundred seventy-nine million, eight hundred sixty thousand, eight hundred forty-nine".