105945187 has 4 divisors (see below), whose sum is σ = 106186960. Its totient is φ = 105703416.

The previous prime is 105945167. The next prime is 105945223. The reversal of 105945187 is 781549501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781549501 = 53 ⋅14746217.

It is a cyclic number.

It is not a de Polignac number, because 105945187 - 2¹⁵ = 105912419 is a prime.

It is a super-2 number, since 2×105945187² = 22448765296929938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105945127) 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, 120228 + ... + 121105.

It is an arithmetic number, because the mean of its divisors is an integer number (26546740).

Almost surely, 2^105945187 is an apocalyptic number.

105945187 is a deficient number, since it is larger than the sum of its proper divisors (241773).

105945187 is an equidigital number, since it uses as much as digits as its factorization.

105945187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241772.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 105945187 is about 10292.9678421726. The cubic root of 105945187 is about 473.1807598025.

The spelling of 105945187 in words is "one hundred five million, nine hundred forty-five thousand, one hundred eighty-seven".