12287999957 has 2 divisors, whose sum is σ = 12287999958. Its totient is φ = 12287999956.

The previous prime is 12287999953. The next prime is 12288000077. The reversal of 12287999957 is 75999978221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12286835716 + 1164241 = 110846^2 + 1079^2 .

It is an emirp because it is prime and its reverse (75999978221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12287999957 - 2² = 12287999953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12287999953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6143999978 + 6143999979.

It is an arithmetic number, because the mean of its divisors is an integer number (6143999979).

Almost surely, 2^12287999957 is an apocalyptic number.

It is an amenable number.

12287999957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12287999957 is an equidigital number, since it uses as much as digits as its factorization.

12287999957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51438240, while the sum is 68.

The spelling of 12287999957 in words is "twelve billion, two hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred fifty-seven".