189473906 has 8 divisors (see below), whose sum is σ = 284522880. Its totient is φ = 94632948.

The previous prime is 189473899. The next prime is 189473917. The reversal of 189473906 is 609374981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×189473906² = 71800722109793672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49706 + ... + 53381.

It is an arithmetic number, because the mean of its divisors is an integer number (35565360).

Almost surely, 2^189473906 is an apocalyptic number.

189473906 is a deficient number, since it is larger than the sum of its proper divisors (95048974).

189473906 is a wasteful number, since it uses less digits than its factorization.

189473906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104008.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 189473906 is about 13764.9520885472. The cubic root of 189473906 is about 574.3586103412.

The spelling of 189473906 in words is "one hundred eighty-nine million, four hundred seventy-three thousand, nine hundred six".