12840097979 has 8 divisors (see below), whose sum is σ = 13260497280. Its totient is φ = 12420086400.

The previous prime is 12840097973. The next prime is 12840097987. The reversal of 12840097979 is 97979004821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12840097979 - 2¹² = 12840093883 is a prime.

It is a super-2 number, since 2×12840097979² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12840097973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28844 + ... + 162825.

It is an arithmetic number, because the mean of its divisors is an integer number (1657562160).

Almost surely, 2^12840097979 is an apocalyptic number.

12840097979 is a deficient number, since it is larger than the sum of its proper divisors (420399301).

12840097979 is a wasteful number, since it uses less digits than its factorization.

12840097979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193861.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 12840097979 in words is "twelve billion, eight hundred forty million, ninety-seven thousand, nine hundred seventy-nine".