189999481 has 8 divisors (see below), whose sum is σ = 226583424. Its totient is φ = 155775840.

The previous prime is 189999473. The next prime is 189999547. The reversal of 189999481 is 184999981.

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

It is a cyclic number.

It is not a de Polignac number, because 189999481 - 2³ = 189999473 is a prime.

It is a super-2 number, since 2×189999481² = 72199605560538722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189999421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589900 + ... + 590221.

It is an arithmetic number, because the mean of its divisors is an integer number (28322928).

Almost surely, 2^189999481 is an apocalyptic number.

It is an amenable number.

189999481 is a deficient number, since it is larger than the sum of its proper divisors (36583943).

189999481 is a wasteful number, since it uses less digits than its factorization.

189999481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180151.

The product of its digits is 1679616, while the sum is 58.

The square root of 189999481 is about 13784.0299259687. The cubic root of 189999481 is about 574.8891844418.

The spelling of 189999481 in words is "one hundred eighty-nine million, nine hundred ninety-nine thousand, four hundred eighty-one".