109664987 has 2 divisors, whose sum is σ = 109664988. Its totient is φ = 109664986.

The previous prime is 109664981. The next prime is 109664993. The reversal of 109664987 is 789466901.

It is a balanced prime because it is at equal distance from previous prime (109664981) and next prime (109664993).

It is a cyclic number.

It is not a de Polignac number, because 109664987 - 2²⁰ = 108616411 is a prime.

It is not a weakly prime, because it can be changed into another prime (109664981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54832493 + 54832494.

It is an arithmetic number, because the mean of its divisors is an integer number (54832494).

Almost surely, 2^109664987 is an apocalyptic number.

109664987 is a deficient number, since it is larger than the sum of its proper divisors (1).

109664987 is an equidigital number, since it uses as much as digits as its factorization.

109664987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 109664987 is about 10472.1051847277. The cubic root of 109664987 is about 478.6550704712.

The spelling of 109664987 in words is "one hundred nine million, six hundred sixty-four thousand, nine hundred eighty-seven".