105988321 has 4 divisors (see below), whose sum is σ = 108573444. Its totient is φ = 103403200.

The previous prime is 105988307. The next prime is 105988369. The reversal of 105988321 is 123889501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5267025 + 100721296 = 2295^2 + 10036^2 .

It is a cyclic number.

It is not a de Polignac number, because 105988321 - 2²¹ = 103891169 is a prime.

It is a super-2 number, since 2×105988321² = 22467048376798082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105988391) 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, 1292500 + ... + 1292581.

It is an arithmetic number, because the mean of its divisors is an integer number (27143361).

Almost surely, 2^105988321 is an apocalyptic number.

It is an amenable number.

105988321 is a deficient number, since it is larger than the sum of its proper divisors (2585123).

105988321 is an equidigital number, since it uses as much as digits as its factorization.

105988321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585122.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 105988321 is about 10295.0629429839. The cubic root of 105988321 is about 473.2449672485.

The spelling of 105988321 in words is "one hundred five million, nine hundred eighty-eight thousand, three hundred twenty-one".