189699565 has 12 divisors (see below), whose sum is σ = 250216092. Its totient is φ = 137962880.

The previous prime is 189699547. The next prime is 189699577. The reversal of 189699565 is 565996981.

It can be written as a sum of positive squares in 2 ways, for example, as 125395204 + 64304361 = 11198^2 + 8019^2 .

It is not a de Polignac number, because 189699565 - 2⁷ = 189699437 is a prime.

It is a super-2 number, since 2×189699565² = 71971849922378450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156172 + ... + 157381.

It is an arithmetic number, because the mean of its divisors is an integer number (20851341).

Almost surely, 2^189699565 is an apocalyptic number.

It is an amenable number.

189699565 is a deficient number, since it is larger than the sum of its proper divisors (60516527).

189699565 is a wasteful number, since it uses less digits than its factorization.

189699565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313580 (or 313569 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 58.

The square root of 189699565 is about 13773.1465177715. The cubic root of 189699565 is about 574.5865357806.

The spelling of 189699565 in words is "one hundred eighty-nine million, six hundred ninety-nine thousand, five hundred sixty-five".