12423397987 has 64 divisors (see below), whose sum is σ = 17165611008. Its totient is φ = 8678016000.

The previous prime is 12423397967. The next prime is 12423397991. The reversal of 12423397987 is 78979332421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12423397987 - 2²³ = 12415009379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12423397927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11121553 + ... + 11122669.

It is an arithmetic number, because the mean of its divisors is an integer number (268212672).

Almost surely, 2^12423397987 is an apocalyptic number.

12423397987 is a deficient number, since it is larger than the sum of its proper divisors (4742213021).

12423397987 is a wasteful number, since it uses less digits than its factorization.

12423397987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460.

The product of its digits is 4572288, while the sum is 55.

The spelling of 12423397987 in words is "twelve billion, four hundred twenty-three million, three hundred ninety-seven thousand, nine hundred eighty-seven".