312374703781 has 4 divisors (see below), whose sum is σ = 356999661472. Its totient is φ = 267749746092.

The previous prime is 312374703779. The next prime is 312374703791. The reversal of 312374703781 is 187307473213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 187307473213 = 7 ⋅26758210459.

It is a cyclic number.

It is not a de Polignac number, because 312374703781 - 2¹ = 312374703779 is a prime.

It is a super-2 number, since 2×312374703781² (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 (312374703791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22312478835 + ... + 22312478848.

It is an arithmetic number, because the mean of its divisors is an integer number (89249915368).

Almost surely, 2^312374703781 is an apocalyptic number.

It is an amenable number.

312374703781 is a deficient number, since it is larger than the sum of its proper divisors (44624957691).

312374703781 is an equidigital number, since it uses as much as digits as its factorization.

312374703781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44624957690.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 312374703781 in words is "three hundred twelve billion, three hundred seventy-four million, seven hundred three thousand, seven hundred eighty-one".