189996655 has 8 divisors (see below), whose sum is σ = 230253984. Its totient is φ = 150492000.

The previous prime is 189996623. The next prime is 189996671. The reversal of 189996655 is 556699981.

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

It is not a de Polignac number, because 189996655 - 2⁵ = 189996623 is a prime.

It is a super-2 number, since 2×189996655² = 72197457822378050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189996655.

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 7 ways as a sum of consecutive naturals, for example, 187611 + ... + 188620.

It is an arithmetic number, because the mean of its divisors is an integer number (28781748).

Almost surely, 2^189996655 is an apocalyptic number.

189996655 is a deficient number, since it is larger than the sum of its proper divisors (40257329).

189996655 is a wasteful number, since it uses less digits than its factorization.

189996655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376337.

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

The square root of 189996655 is about 13783.9274156533. The cubic root of 189996655 is about 574.8863341798.

The spelling of 189996655 in words is "one hundred eighty-nine million, nine hundred ninety-six thousand, six hundred fifty-five".