12347014781 has 4 divisors (see below), whose sum is σ = 12351294432. Its totient is φ = 12342735132.

The previous prime is 12347014759. The next prime is 12347014843. The reversal of 12347014781 is 18741074321.

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: 18741074321 = 557 ⋅33646453.

It is a cyclic number.

It is not a de Polignac number, because 12347014781 - 2¹⁴ = 12346998397 is a prime.

It is a super-2 number, since 2×12347014781² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12347064781) 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, 2135495 + ... + 2141268.

It is an arithmetic number, because the mean of its divisors is an integer number (3087823608).

Almost surely, 2^12347014781 is an apocalyptic number.

It is an amenable number.

12347014781 is a deficient number, since it is larger than the sum of its proper divisors (4279651).

12347014781 is an equidigital number, since it uses as much as digits as its factorization.

12347014781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279650.

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 12347014781 in words is "twelve billion, three hundred forty-seven million, fourteen thousand, seven hundred eighty-one".