105444987 has 8 divisors (see below), whose sum is σ = 143863104. Its totient is φ = 68661768.

The previous prime is 105444979. The next prime is 105445031. The reversal of 105444987 is 789444501.

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

It is not a de Polignac number, because 105444987 - 2³ = 105444979 is a prime.

It is a super-2 number, since 2×105444987² = 22237290566860338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105444587) 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, 408573 + ... + 408830.

It is an arithmetic number, because the mean of its divisors is an integer number (17982888).

Almost surely, 2^105444987 is an apocalyptic number.

105444987 is a deficient number, since it is larger than the sum of its proper divisors (38418117).

105444987 is an equidigital number, since it uses as much as digits as its factorization.

105444987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817449.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 105444987 is about 10268.6409519469. The cubic root of 105444987 is about 472.4349071888.

The spelling of 105444987 in words is "one hundred five million, four hundred forty-four thousand, nine hundred eighty-seven".