12307000781 has 4 divisors (see below), whose sum is σ = 12311191200. Its totient is φ = 12302810364.

The previous prime is 12307000759. The next prime is 12307000787. The reversal of 12307000781 is 18700070321.

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: 18700070321 = 283 ⋅66077987.

It is a cyclic number.

It is not a de Polignac number, because 12307000781 - 2¹⁴ = 12306984397 is a prime.

It is a super-2 number, since 2×12307000781² (a number of 21 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 (12307000787) 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, 2090801 + ... + 2096678.

It is an arithmetic number, because the mean of its divisors is an integer number (3077797800).

Almost surely, 2^12307000781 is an apocalyptic number.

12307000781 is the 49613-rd centered decagonal number.

It is an amenable number.

12307000781 is a deficient number, since it is larger than the sum of its proper divisors (4190419).

12307000781 is an equidigital number, since it uses as much as digits as its factorization.

12307000781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190418.

The product of its (nonzero) digits is 2352, while the sum is 29.

The spelling of 12307000781 in words is "twelve billion, three hundred seven million, seven hundred eighty-one", and thus it is an aban number.