12617989847 has 2 divisors, whose sum is σ = 12617989848. Its totient is φ = 12617989846.

The previous prime is 12617989841. The next prime is 12617989933. The reversal of 12617989847 is 74898971621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12617989847 - 2²⁶ = 12550880983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12617989847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12617989841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6308994923 + 6308994924.

It is an arithmetic number, because the mean of its divisors is an integer number (6308994924).

Almost surely, 2^12617989847 is an apocalyptic number.

12617989847 is a deficient number, since it is larger than the sum of its proper divisors (1).

12617989847 is an equidigital number, since it uses as much as digits as its factorization.

12617989847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 62.

The spelling of 12617989847 in words is "twelve billion, six hundred seventeen million, nine hundred eighty-nine thousand, eight hundred forty-seven".