189869663 has 4 divisors (see below), whose sum is σ = 192003120. Its totient is φ = 187736208.

The previous prime is 189869653. The next prime is 189869683. The reversal of 189869663 is 366968981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366968981 = 491 ⋅747391.

It is a cyclic number.

It is not a de Polignac number, because 189869663 - 2¹⁰ = 189868639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189869599 and 189869608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189869653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066595 + ... + 1066772.

It is an arithmetic number, because the mean of its divisors is an integer number (48000780).

Almost surely, 2^189869663 is an apocalyptic number.

189869663 is a deficient number, since it is larger than the sum of its proper divisors (2133457).

189869663 is an equidigital number, since it uses as much as digits as its factorization.

189869663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133456.

The product of its digits is 3359232, while the sum is 56.

The square root of 189869663 is about 13779.3201211090. The cubic root of 189869663 is about 574.7582227368.

The spelling of 189869663 in words is "one hundred eighty-nine million, eight hundred sixty-nine thousand, six hundred sixty-three".