189039691 has 8 divisors (see below), whose sum is σ = 198032544. Its totient is φ = 180111360.

The previous prime is 189039667. The next prime is 189039703. The reversal of 189039691 is 196930981.

189039691 is nontrivially palindromic in base 16.

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

It is a cyclic number.

It is not a de Polignac number, because 189039691 - 2¹⁹ = 188515403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189039601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10080 + ... + 21901.

It is an arithmetic number, because the mean of its divisors is an integer number (24754068).

Almost surely, 2^189039691 is an apocalyptic number.

189039691 is a deficient number, since it is larger than the sum of its proper divisors (8992853).

189039691 is a wasteful number, since it uses less digits than its factorization.

189039691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32261.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 189039691 is about 13749.1705568009. The cubic root of 189039691 is about 573.9195245869.

The spelling of 189039691 in words is "one hundred eighty-nine million, thirty-nine thousand, six hundred ninety-one".