189423154 has 4 divisors (see below), whose sum is σ = 284134734. Its totient is φ = 94711576.

The previous prime is 189423149. The next prime is 189423173. The reversal of 189423154 is 451324981.

189423154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 109767529 + 79655625 = 10477^2 + 8925^2 .

It is a super-2 number, since 2×189423154² = 71762262542615432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47355787 + ... + 47355790.

Almost surely, 2^189423154 is an apocalyptic number.

189423154 is a deficient number, since it is larger than the sum of its proper divisors (94711580).

189423154 is an equidigital number, since it uses as much as digits as its factorization.

189423154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94711579.

The product of its digits is 34560, while the sum is 37.

The square root of 189423154 is about 13763.1084424995. The cubic root of 189423154 is about 574.3073236814.

The spelling of 189423154 in words is "one hundred eighty-nine million, four hundred twenty-three thousand, one hundred fifty-four".