12373534781 has 2 divisors, whose sum is σ = 12373534782. Its totient is φ = 12373534780.

The previous prime is 12373534751. The next prime is 12373534801. The reversal of 12373534781 is 18743537321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10372404025 + 2001130756 = 101845^2 + 44734^2 .

It is a cyclic number.

It is not a de Polignac number, because 12373534781 - 2²⁶ = 12306425917 is a prime.

It is a super-2 number, since 2×12373534781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12373534721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6186767390 + 6186767391.

It is an arithmetic number, because the mean of its divisors is an integer number (6186767391).

Almost surely, 2^12373534781 is an apocalyptic number.

It is an amenable number.

12373534781 is a deficient number, since it is larger than the sum of its proper divisors (1).

12373534781 is an equidigital number, since it uses as much as digits as its factorization.

12373534781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The spelling of 12373534781 in words is "twelve billion, three hundred seventy-three million, five hundred thirty-four thousand, seven hundred eighty-one".