10911987 has 6 divisors (see below), whose sum is σ = 15761772. Its totient is φ = 7274652.

The previous prime is 10911961. The next prime is 10911997. The reversal of 10911987 is 78911901.

10911987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10911987 - 2⁸ = 10911731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10911997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 606213 + ... + 606230.

It is an arithmetic number, because the mean of its divisors is an integer number (2626962).

Almost surely, 2^10911987 is an apocalyptic number.

10911987 is a deficient number, since it is larger than the sum of its proper divisors (4849785).

10911987 is a wasteful number, since it uses less digits than its factorization.

10911987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212449 (or 1212446 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 10911987 is about 3303.3296838190. The cubic root of 10911987 is about 221.8032710541.

The spelling of 10911987 in words is "ten million, nine hundred eleven thousand, nine hundred eighty-seven".