11739031987 has 2 divisors, whose sum is σ = 11739031988. Its totient is φ = 11739031986.

The previous prime is 11739031903. The next prime is 11739031999. The reversal of 11739031987 is 78913093711.

It is a strong prime.

It is an emirp because it is prime and its reverse (78913093711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11739031987 - 2²⁷ = 11604814259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11739031987.

It is not a weakly prime, because it can be changed into another prime (11739031487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5869515993 + 5869515994.

It is an arithmetic number, because the mean of its divisors is an integer number (5869515994).

Almost surely, 2^11739031987 is an apocalyptic number.

11739031987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11739031987 is an equidigital number, since it uses as much as digits as its factorization.

11739031987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 11739031987 in words is "eleven billion, seven hundred thirty-nine million, thirty-one thousand, nine hundred eighty-seven".