110891987 has 2 divisors, whose sum is σ = 110891988. Its totient is φ = 110891986.

The previous prime is 110891983. The next prime is 110892029. The reversal of 110891987 is 789198011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 110891987 - 2² = 110891983 is a prime.

It is not a weakly prime, because it can be changed into another prime (110891981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55445993 + 55445994.

It is an arithmetic number, because the mean of its divisors is an integer number (55445994).

Almost surely, 2^110891987 is an apocalyptic number.

110891987 is a deficient number, since it is larger than the sum of its proper divisors (1).

110891987 is an equidigital number, since it uses as much as digits as its factorization.

110891987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 44.

The square root of 110891987 is about 10530.5264350839. The cubic root of 110891987 is about 480.4336171357.

The spelling of 110891987 in words is "one hundred ten million, eight hundred ninety-one thousand, nine hundred eighty-seven".