12456696397 has 4 divisors (see below), whose sum is σ = 12456924220. Its totient is φ = 12456468576.

The previous prime is 12456696391. The next prime is 12456696401. The reversal of 12456696397 is 79369665421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6154559401 + 6302136996 = 78451^2 + 79386^2 .

It is a 3-Lehmer number, since φ(12456696397) divides (12456696397-1)³.

It is a cyclic number.

It is not a de Polignac number, because 12456696397 - 2³ = 12456696389 is a prime.

It is a deceptive number, since it divides R_12456696396.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456696391) 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, 22783 + ... + 159475.

It is an arithmetic number, because the mean of its divisors is an integer number (3114231055).

Almost surely, 2^12456696397 is an apocalyptic number.

12456696397 is the 91129-th pentagonal number.

It is an amenable number.

12456696397 is a deficient number, since it is larger than the sum of its proper divisors (227823).

12456696397 is an equidigital number, since it uses as much as digits as its factorization.

12456696397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227822.

The product of its digits is 14696640, while the sum is 58.

The spelling of 12456696397 in words is "twelve billion, four hundred fifty-six million, six hundred ninety-six thousand, three hundred ninety-seven".