3112368781 has 4 divisors (see below), whose sum is σ = 3131463232. Its totient is φ = 3093274332.

The previous prime is 3112368773. The next prime is 3112368799. The reversal of 3112368781 is 1878632113.

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: 1878632113 = 109 ⋅17235157.

It is a cyclic number.

It is not a de Polignac number, because 3112368781 - 2³ = 3112368773 is a prime.

It is a super-2 number, since 2×3112368781² = 19373678857886851922, which 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 (3112368751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9546981 + ... + 9547306.

It is an arithmetic number, because the mean of its divisors is an integer number (782865808).

Almost surely, 2^3112368781 is an apocalyptic number.

It is an amenable number.

3112368781 is a deficient number, since it is larger than the sum of its proper divisors (19094451).

3112368781 is a wasteful number, since it uses less digits than its factorization.

3112368781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19094450.

The product of its digits is 48384, while the sum is 40.

The square root of 3112368781 is about 55788.6079858603. The cubic root of 3112368781 is about 1460.0364007000.

The spelling of 3112368781 in words is "three billion, one hundred twelve million, three hundred sixty-eight thousand, seven hundred eighty-one".