921899011 has 8 divisors (see below), whose sum is σ = 1017825984. Its totient is φ = 827991720.

The previous prime is 921898997. The next prime is 921899021. The reversal of 921899011 is 110998129.

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 921899011 - 2⁹ = 921898499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921899021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 503961 + ... + 505786.

It is an arithmetic number, because the mean of its divisors is an integer number (127228248).

Almost surely, 2^921899011 is an apocalyptic number.

921899011 is a deficient number, since it is larger than the sum of its proper divisors (95926973).

921899011 is a wasteful number, since it uses less digits than its factorization.

921899011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009841.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 921899011 is about 30362.7899080437. The cubic root of 921899011 is about 973.2575535887.

The spelling of 921899011 in words is "nine hundred twenty-one million, eight hundred ninety-nine thousand, eleven".