190669505 has 16 divisors (see below), whose sum is σ = 248952144. Its totient is φ = 139345920.

The previous prime is 190669481. The next prime is 190669511. The reversal of 190669505 is 505966091.

190669505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 41267776 + 149401729 = 6424^2 + 12223^2 .

It is not a de Polignac number, because 190669505 - 2²⁰ = 189620929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8816 + ... + 21425.

It is an arithmetic number, because the mean of its divisors is an integer number (15559509).

Almost surely, 2^190669505 is an apocalyptic number.

It is an amenable number.

190669505 is a deficient number, since it is larger than the sum of its proper divisors (58282639).

190669505 is a wasteful number, since it uses less digits than its factorization.

190669505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30356.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 190669505 is about 13808.3128947747. The cubic root of 190669505 is about 575.5641646220.

The spelling of 190669505 in words is "one hundred ninety million, six hundred sixty-nine thousand, five hundred five".