105105387 has 4 divisors (see below), whose sum is σ = 140140520. Its totient is φ = 70070256.

The previous prime is 105105337. The next prime is 105105389. The reversal of 105105387 is 783501501.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 105105387 - 2⁶ = 105105323 is a prime.

It is a super-2 number, since 2×105105387² = 22094284752839538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105105389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17517562 + ... + 17517567.

It is an arithmetic number, because the mean of its divisors is an integer number (35035130).

Almost surely, 2^105105387 is an apocalyptic number.

105105387 is a deficient number, since it is larger than the sum of its proper divisors (35035133).

105105387 is an equidigital number, since it uses as much as digits as its factorization.

105105387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35035132.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 105105387 is about 10252.0918353280. The cubic root of 105105387 is about 471.9271813236.

Adding to 105105387 its reverse (783501501), we get a palindrome (888606888).

The spelling of 105105387 in words is "one hundred five million, one hundred five thousand, three hundred eighty-seven".