12353717997 has 20 divisors (see below), whose sum is σ = 18492904320. Its totient is φ = 8218592424.

The previous prime is 12353717993. The next prime is 12353718031. The reversal of 12353717997 is 79971735321.

12353717997 is a `hidden beast` number, since 1 + 2 + 3 + 537 + 17 + 9 + 97 = 666.

It is not a de Polignac number, because 12353717997 - 2² = 12353717993 is a prime.

It is a super-2 number, since 2×12353717997² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12353717993) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 120403 + ... + 198000.

It is an arithmetic number, because the mean of its divisors is an integer number (924645216).

Almost surely, 2^12353717997 is an apocalyptic number.

It is an amenable number.

12353717997 is a deficient number, since it is larger than the sum of its proper divisors (6139186323).

12353717997 is an equidigital number, since it uses as much as digits as its factorization.

12353717997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318894 (or 318885 counting only the distinct ones).

The product of its digits is 2500470, while the sum is 54.

The spelling of 12353717997 in words is "twelve billion, three hundred fifty-three million, seven hundred seventeen thousand, nine hundred ninety-seven".