11982986987 has 2 divisors, whose sum is σ = 11982986988. Its totient is φ = 11982986986.

The previous prime is 11982986957. The next prime is 11982987001. The reversal of 11982986987 is 78968928911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11982986987 - 2²⁰ = 11981938411 is a prime.

It is a super-2 number, since 2×11982986987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11982986927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5991493493 + 5991493494.

It is an arithmetic number, because the mean of its divisors is an integer number (5991493494).

Almost surely, 2^11982986987 is an apocalyptic number.

11982986987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11982986987 is an equidigital number, since it uses as much as digits as its factorization.

11982986987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 68.

The spelling of 11982986987 in words is "eleven billion, nine hundred eighty-two million, nine hundred eighty-six thousand, nine hundred eighty-seven".