189552639 has 4 divisors (see below), whose sum is σ = 252736856. Its totient is φ = 126368424.

The previous prime is 189552619. The next prime is 189552673. The reversal of 189552639 is 936255981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 189552639 - 2²¹ = 187455487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189552619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31592104 + ... + 31592109.

It is an arithmetic number, because the mean of its divisors is an integer number (63184214).

Almost surely, 2^189552639 is an apocalyptic number.

189552639 is a deficient number, since it is larger than the sum of its proper divisors (63184217).

189552639 is an equidigital number, since it uses as much as digits as its factorization.

189552639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63184216.

The product of its digits is 583200, while the sum is 48.

The square root of 189552639 is about 13767.8116997582. The cubic root of 189552639 is about 574.4381546528.

The spelling of 189552639 in words is "one hundred eighty-nine million, five hundred fifty-two thousand, six hundred thirty-nine".