109939987 has 8 divisors (see below), whose sum is σ = 113492016. Its totient is φ = 106418592.

The previous prime is 109939979. The next prime is 109939993. The reversal of 109939987 is 789939901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109939987 - 2³ = 109939979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109939997) 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 in 7 ways as a sum of consecutive naturals, for example, 253 + ... + 14830.

It is an arithmetic number, because the mean of its divisors is an integer number (14186502).

Almost surely, 2^109939987 is an apocalyptic number.

109939987 is a deficient number, since it is larger than the sum of its proper divisors (3552029).

109939987 is a wasteful number, since it uses less digits than its factorization.

109939987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15317.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 109939987 is about 10485.2270838547. The cubic root of 109939987 is about 479.0548342552.

The spelling of 109939987 in words is "one hundred nine million, nine hundred thirty-nine thousand, nine hundred eighty-seven".