190900505 has 16 divisors (see below), whose sum is σ = 243285120. Its totient is φ = 143394048.

The previous prime is 190900499. The next prime is 190900513. The reversal of 190900505 is 505009091.

It is a cyclic number.

It is not a de Polignac number, because 190900505 - 2²⁰ = 189851929 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844 + ... + 19626.

It is an arithmetic number, because the mean of its divisors is an integer number (15205320).

Almost surely, 2^190900505 is an apocalyptic number.

It is an amenable number.

190900505 is a deficient number, since it is larger than the sum of its proper divisors (52384615).

190900505 is a wasteful number, since it uses less digits than its factorization.

190900505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17920.

The product of its (nonzero) digits is 2025, while the sum is 29.

The square root of 190900505 is about 13816.6748894226. The cubic root of 190900505 is about 575.7965067322.

Adding to 190900505 its reverse (505009091), we get a palindrome (695909596).

The spelling of 190900505 in words is "one hundred ninety million, nine hundred thousand, five hundred five".