189520689 has 8 divisors (see below), whose sum is σ = 256466080. Its totient is φ = 124461216.

The previous prime is 189520679. The next prime is 189520729. The reversal of 189520689 is 986025981.

It is a happy number.

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

It is not a de Polignac number, because 189520689 - 2⁴ = 189520673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189520609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471244 + ... + 471645.

It is an arithmetic number, because the mean of its divisors is an integer number (32058260).

Almost surely, 2^189520689 is an apocalyptic number.

It is an amenable number.

189520689 is a deficient number, since it is larger than the sum of its proper divisors (66945391).

189520689 is an equidigital number, since it uses as much as digits as its factorization.

189520689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942959.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 189520689 is about 13766.6513357461. The cubic root of 189520689 is about 574.4058780771.

The spelling of 189520689 in words is "one hundred eighty-nine million, five hundred twenty thousand, six hundred eighty-nine".