10915987 has 2 divisors, whose sum is σ = 10915988. Its totient is φ = 10915986.

The previous prime is 10915973. The next prime is 10915991. The reversal of 10915987 is 78951901.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10915987 is a prime.

It is not a weakly prime, because it can be changed into another prime (10915907) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5457993 + 5457994.

It is an arithmetic number, because the mean of its divisors is an integer number (5457994).

Almost surely, 2^10915987 is an apocalyptic number.

10915987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10915987 is an equidigital number, since it uses as much as digits as its factorization.

10915987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 10915987 is about 3303.9350780547. The cubic root of 10915987 is about 221.8303698370.

The spelling of 10915987 in words is "ten million, nine hundred fifteen thousand, nine hundred eighty-seven".