105390289 has 4 divisors (see below), whose sum is σ = 105677824. Its totient is φ = 105102756.

The previous prime is 105390277. The next prime is 105390323. The reversal of 105390289 is 982093501.

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: 982093501 = 4273 ⋅229837.

It is a cyclic number.

It is not a de Polignac number, because 105390289 - 2⁹ = 105389777 is a prime.

It is a super-2 number, since 2×105390289² = 22214226031007042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105390239) 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, 143217 + ... + 143950.

It is an arithmetic number, because the mean of its divisors is an integer number (26419456).

Almost surely, 2^105390289 is an apocalyptic number.

It is an amenable number.

105390289 is a deficient number, since it is larger than the sum of its proper divisors (287535).

105390289 is an equidigital number, since it uses as much as digits as its factorization.

105390289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287534.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 105390289 is about 10265.9772549914. The cubic root of 105390289 is about 472.3532035605.

The spelling of 105390289 in words is "one hundred five million, three hundred ninety thousand, two hundred eighty-nine".