12611987 has 2 divisors, whose sum is σ = 12611988. Its totient is φ = 12611986.

The previous prime is 12611957. The next prime is 12611993. The reversal of 12611987 is 78911621.

It is a strong prime.

It is an emirp because it is prime and its reverse (78911621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12611987 - 2¹⁰ = 12610963 is a prime.

It is not a weakly prime, because it can be changed into another prime (12611917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6305993 + 6305994.

It is an arithmetic number, because the mean of its divisors is an integer number (6305994).

Almost surely, 2^12611987 is an apocalyptic number.

12611987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12611987 is an equidigital number, since it uses as much as digits as its factorization.

12611987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 35.

The square root of 12611987 is about 3551.3359458097. The cubic root of 12611987 is about 232.7704456898.

The spelling of 12611987 in words is "twelve million, six hundred eleven thousand, nine hundred eighty-seven".