105190090 has 8 divisors (see below), whose sum is σ = 189342180. Its totient is φ = 42076032.

The previous prime is 105190081. The next prime is 105190091. The reversal of 105190090 is 90091501.

It can be written as a sum of positive squares in 2 ways, for example, as 104427961 + 762129 = 10219^2 + 873^2 .

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

It is a super-2 number, since 2×105190090² = 22129910068416200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105190091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5259495 + ... + 5259514.

Almost surely, 2^105190090 is an apocalyptic number.

105190090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105190090 is a deficient number, since it is larger than the sum of its proper divisors (84152090).

105190090 is a wasteful number, since it uses less digits than its factorization.

105190090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10519016.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 105190090 is about 10256.2220139777. Note that the first 3 decimals coincide. The cubic root of 105190090 is about 472.0539205133.

The spelling of 105190090 in words is "one hundred five million, one hundred ninety thousand, ninety".