105870289 has 4 divisors (see below), whose sum is σ = 120994624. Its totient is φ = 90745956.

The previous prime is 105870277. The next prime is 105870341. The reversal of 105870289 is 982078501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 982078501 = 2213 ⋅443777.

It is not a de Polignac number, because 105870289 - 2¹⁵ = 105837521 is a prime.

It is a super-2 number, since 2×105870289² = 22417036185887042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105870229) 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, 7562157 + ... + 7562170.

It is an arithmetic number, because the mean of its divisors is an integer number (30248656).

Almost surely, 2^105870289 is an apocalyptic number.

It is an amenable number.

105870289 is a deficient number, since it is larger than the sum of its proper divisors (15124335).

105870289 is an equidigital number, since it uses as much as digits as its factorization.

105870289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15124334.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 105870289 is about 10289.3288896798. The cubic root of 105870289 is about 473.0692283954.

The spelling of 105870289 in words is "one hundred five million, eight hundred seventy thousand, two hundred eighty-nine".