189732081 has 64 divisors (see below), whose sum is σ = 335462400. Its totient is φ = 92404800.

The previous prime is 189732073. The next prime is 189732089. The reversal of 189732081 is 180237981.

It is an interprime number because it is at equal distance from previous prime (189732073) and next prime (189732089).

It is not a de Polignac number, because 189732081 - 2³ = 189732073 is a prime.

It is a super-2 number, since 2×189732081² = 71996525121181122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189732089) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 609916 + ... + 610226.

It is an arithmetic number, because the mean of its divisors is an integer number (5241600).

Almost surely, 2^189732081 is an apocalyptic number.

189732081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

189732081 is a deficient number, since it is larger than the sum of its proper divisors (145730319).

189732081 is a wasteful number, since it uses less digits than its factorization.

189732081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 189732081 is about 13774.3268801056. The cubic root of 189732081 is about 574.6193634580.

The spelling of 189732081 in words is "one hundred eighty-nine million, seven hundred thirty-two thousand, eighty-one".