105992090 has 8 divisors (see below), whose sum is σ = 190785780. Its totient is φ = 42396832.

The previous prime is 105992077. The next prime is 105992099. The reversal of 105992090 is 90299501.

It can be written as a sum of positive squares in 2 ways, for example, as 103774969 + 2217121 = 10187^2 + 1489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×105992090² = 22468646285136200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105992090.

It is not an unprimeable number, because it can be changed into a prime (105992099) 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, 5299595 + ... + 5299614.

Almost surely, 2^105992090 is an apocalyptic number.

105992090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105992090 is a deficient number, since it is larger than the sum of its proper divisors (84793690).

105992090 is a wasteful number, since it uses less digits than its factorization.

105992090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10599216.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 105992090 is about 10295.2459902617. The cubic root of 105992090 is about 473.2505767946.

The spelling of 105992090 in words is "one hundred five million, nine hundred ninety-two thousand, ninety".