12987009293 has 2 divisors, whose sum is σ = 12987009294. Its totient is φ = 12987009292.

The previous prime is 12987009281. The next prime is 12987009313. The reversal of 12987009293 is 39290078921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8242279369 + 4744729924 = 90787^2 + 68882^2 .

It is a cyclic number.

It is not a de Polignac number, because 12987009293 - 2⁸ = 12987009037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12987009493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6493504646 + 6493504647.

It is an arithmetic number, because the mean of its divisors is an integer number (6493504647).

Almost surely, 2^12987009293 is an apocalyptic number.

It is an amenable number.

12987009293 is a deficient number, since it is larger than the sum of its proper divisors (1).

12987009293 is an equidigital number, since it uses as much as digits as its factorization.

12987009293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 12987009293 in words is "twelve billion, nine hundred eighty-seven million, nine thousand, two hundred ninety-three".