109990787 has 2 divisors, whose sum is σ = 109990788. Its totient is φ = 109990786.

The previous prime is 109990781. The next prime is 109990789. The reversal of 109990787 is 787099901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109990787 - 2⁶ = 109990723 is a prime.

Together with 109990789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109990781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54995393 + 54995394.

It is an arithmetic number, because the mean of its divisors is an integer number (54995394).

Almost surely, 2^109990787 is an apocalyptic number.

109990787 is a deficient number, since it is larger than the sum of its proper divisors (1).

109990787 is an equidigital number, since it uses as much as digits as its factorization.

109990787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 109990787 is about 10487.6492599629. The cubic root of 109990787 is about 479.1286085597.

The spelling of 109990787 in words is "one hundred nine million, nine hundred ninety thousand, seven hundred eighty-seven".