189920571 has 16 divisors (see below), whose sum is σ = 260923680. Its totient is φ = 122819840.

The previous prime is 189920543. The next prime is 189920597. The reversal of 189920571 is 175029981.

It is a cyclic number.

It is not a de Polignac number, because 189920571 - 2⁷ = 189920443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189920531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7441 + ... + 20861.

It is an arithmetic number, because the mean of its divisors is an integer number (16307730).

Almost surely, 2^189920571 is an apocalyptic number.

189920571 is a deficient number, since it is larger than the sum of its proper divisors (71003109).

189920571 is a wasteful number, since it uses less digits than its factorization.

189920571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13566.

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 189920571 is about 13781.1672582550. The cubic root of 189920571 is about 574.8095863521.

The spelling of 189920571 in words is "one hundred eighty-nine million, nine hundred twenty thousand, five hundred seventy-one".