189159394 has 4 divisors (see below), whose sum is σ = 283739094. Its totient is φ = 94579696.

The previous prime is 189159367. The next prime is 189159403. The reversal of 189159394 is 493951981.

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., 188046369 + 1113025 = 13713^2 + 1055^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47289847 + ... + 47289850.

Almost surely, 2^189159394 is an apocalyptic number.

189159394 is a deficient number, since it is larger than the sum of its proper divisors (94579700).

189159394 is an equidigital number, since it uses as much as digits as its factorization.

189159394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94579699.

The product of its digits is 349920, while the sum is 49.

The square root of 189159394 is about 13753.5229668620. The cubic root of 189159394 is about 574.0406374124.

The spelling of 189159394 in words is "one hundred eighty-nine million, one hundred fifty-nine thousand, three hundred ninety-four".