11115925987 has 2 divisors, whose sum is σ = 11115925988. Its totient is φ = 11115925986.

The previous prime is 11115925969. The next prime is 11115925993. The reversal of 11115925987 is 78952951111.

It is a strong prime.

It is an emirp because it is prime and its reverse (78952951111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11115925987 - 2⁷ = 11115925859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11115925987.

It is not a weakly prime, because it can be changed into another prime (11115925957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557962993 + 5557962994.

It is an arithmetic number, because the mean of its divisors is an integer number (5557962994).

Almost surely, 2^11115925987 is an apocalyptic number.

11115925987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115925987 is an equidigital number, since it uses as much as digits as its factorization.

11115925987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 49.

The spelling of 11115925987 in words is "eleven billion, one hundred fifteen million, nine hundred twenty-five thousand, nine hundred eighty-seven".