189663458 has 16 divisors (see below), whose sum is σ = 308579544. Its totient is φ = 87075840.

The previous prime is 189663449. The next prime is 189663473. The reversal of 189663458 is 854366981.

It can be written as a sum of positive squares in 4 ways, for example, as 99660289 + 90003169 = 9983^2 + 9487^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66635 + ... + 69422.

Almost surely, 2^189663458 is an apocalyptic number.

189663458 is a deficient number, since it is larger than the sum of its proper divisors (118916086).

189663458 is a wasteful number, since it uses less digits than its factorization.

189663458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136117.

The product of its digits is 1244160, while the sum is 50.

The square root of 189663458 is about 13771.8356801118. The cubic root of 189663458 is about 574.5500782862.

The spelling of 189663458 in words is "one hundred eighty-nine million, six hundred sixty-three thousand, four hundred fifty-eight".