12819439897 has 16 divisors (see below), whose sum is σ = 14764651200. Its totient is φ = 11007843840.

The previous prime is 12819439877. The next prime is 12819439907. The reversal of 12819439897 is 79893491821.

It is a cyclic number.

It is not a de Polignac number, because 12819439897 - 2¹⁵ = 12819407129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12819439807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20572 + ... + 161437.

It is an arithmetic number, because the mean of its divisors is an integer number (922790700).

Almost surely, 2^12819439897 is an apocalyptic number.

It is an amenable number.

12819439897 is a deficient number, since it is larger than the sum of its proper divisors (1945211303).

12819439897 is a wasteful number, since it uses less digits than its factorization.

12819439897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182376.

The product of its digits is 7838208, while the sum is 61.

The spelling of 12819439897 in words is "twelve billion, eight hundred nineteen million, four hundred thirty-nine thousand, eight hundred ninety-seven".