189491011 has 8 divisors (see below), whose sum is σ = 191252880. Its totient is φ = 187737312.

The previous prime is 189490999. The next prime is 189491033. The reversal of 189491011 is 110194981.

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 189491011 - 2¹¹ = 189488963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189491041) 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, 50641 + ... + 54253.

It is an arithmetic number, because the mean of its divisors is an integer number (23906610).

Almost surely, 2^189491011 is an apocalyptic number.

189491011 is a deficient number, since it is larger than the sum of its proper divisors (1761869).

189491011 is a wasteful number, since it uses less digits than its factorization.

189491011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085.

The product of its (nonzero) digits is 2592, while the sum is 34.

The square root of 189491011 is about 13765.5733988817. The cubic root of 189491011 is about 574.3758934746.

The spelling of 189491011 in words is "one hundred eighty-nine million, four hundred ninety-one thousand, eleven".