105912987 has 8 divisors (see below), whose sum is σ = 142537536. Its totient is φ = 69948552.

The previous prime is 105912971. The next prime is 105912991. The reversal of 105912987 is 789219501.

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

It is not a de Polignac number, because 105912987 - 2⁴ = 105912971 is a prime.

It is a super-2 number, since 2×105912987² = 22435121630524338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105912967) 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, 164653 + ... + 165294.

It is an arithmetic number, because the mean of its divisors is an integer number (17817192).

Almost surely, 2^105912987 is an apocalyptic number.

105912987 is a deficient number, since it is larger than the sum of its proper divisors (36624549).

105912987 is a wasteful number, since it uses less digits than its factorization.

105912987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330057.

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 105912987 is about 10291.4035485934. The cubic root of 105912987 is about 473.1328168842.

The spelling of 105912987 in words is "one hundred five million, nine hundred twelve thousand, nine hundred eighty-seven".