109903987 has 4 divisors (see below), whose sum is σ = 110971120. Its totient is φ = 108836856.

The previous prime is 109903957. The next prime is 109904009. The reversal of 109903987 is 789309901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109903987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109903957) 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 3 ways as a sum of consecutive naturals, for example, 533412 + ... + 533617.

It is an arithmetic number, because the mean of its divisors is an integer number (27742780).

Almost surely, 2^109903987 is an apocalyptic number.

109903987 is a deficient number, since it is larger than the sum of its proper divisors (1067133).

109903987 is a wasteful number, since it uses less digits than its factorization.

109903987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067132.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 109903987 is about 10483.5102422805. The cubic root of 109903987 is about 479.0025394920.

The spelling of 109903987 in words is "one hundred nine million, nine hundred three thousand, nine hundred eighty-seven".