109995987 has 8 divisors (see below), whose sum is σ = 146788240. Its totient is φ = 73267200.

The previous prime is 109995979. The next prime is 109996031. The reversal of 109995987 is 789599901.

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

It is not a de Polignac number, because 109995987 - 2³ = 109995979 is a prime.

It is a super-2 number, since 2×109995987² = 24198234312208338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109995917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11662 + ... + 18867.

It is an arithmetic number, because the mean of its divisors is an integer number (18348530).

Almost surely, 2^109995987 is an apocalyptic number.

109995987 is a deficient number, since it is larger than the sum of its proper divisors (36792253).

109995987 is a wasteful number, since it uses less digits than its factorization.

109995987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31733.

The product of its (nonzero) digits is 1837080, while the sum is 57.

The square root of 109995987 is about 10487.8971676881. The cubic root of 109995987 is about 479.1361589785.

The spelling of 109995987 in words is "one hundred nine million, nine hundred ninety-five thousand, nine hundred eighty-seven".