13420786397 has 4 divisors (see below), whose sum is σ = 13604632860. Its totient is φ = 13236939936.

The previous prime is 13420786369. The next prime is 13420786403. The reversal of 13420786397 is 79368702431.

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 8488673956 + 4932112441 = 92134^2 + 70229^2 .

It is a cyclic number.

It is not a de Polignac number, because 13420786397 - 2²⁴ = 13404009181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420786997) 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, 91923122 + ... + 91923267.

It is an arithmetic number, because the mean of its divisors is an integer number (3401158215).

Almost surely, 2^13420786397 is an apocalyptic number.

It is an amenable number.

13420786397 is a deficient number, since it is larger than the sum of its proper divisors (183846463).

13420786397 is an equidigital number, since it uses as much as digits as its factorization.

13420786397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183846462.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 13420786397 in words is "thirteen billion, four hundred twenty million, seven hundred eighty-six thousand, three hundred ninety-seven".