12693951917 has 4 divisors (see below), whose sum is σ = 12722606880. Its totient is φ = 12665296956.

The previous prime is 12693951899. The next prime is 12693951937. The reversal of 12693951917 is 71915939621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71915939621 = 1123 ⋅64039127.

It is a cyclic number.

It is not a de Polignac number, because 12693951917 - 2¹⁴ = 12693935533 is a prime.

It is a super-2 number, since 2×12693951917² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12693951937) 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, 14326817 + ... + 14327702.

It is an arithmetic number, because the mean of its divisors is an integer number (3180651720).

Almost surely, 2^12693951917 is an apocalyptic number.

It is an amenable number.

12693951917 is a deficient number, since it is larger than the sum of its proper divisors (28654963).

12693951917 is an equidigital number, since it uses as much as digits as its factorization.

12693951917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28654962.

The product of its digits is 918540, while the sum is 53.

The spelling of 12693951917 in words is "twelve billion, six hundred ninety-three million, nine hundred fifty-one thousand, nine hundred seventeen".