921198086 has 20 divisors (see below), whose sum is σ = 1425031260. Its totient is φ = 446608080.

The previous prime is 921198037. The next prime is 921198101. The reversal of 921198086 is 680891129.

921198086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5651441 + ... + 5651603.

It is an arithmetic number, because the mean of its divisors is an integer number (71251563).

Almost surely, 2^921198086 is an apocalyptic number.

921198086 is a deficient number, since it is larger than the sum of its proper divisors (503833174).

921198086 is an frugal number, since it uses more digits than its factorization.

921198086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 921198086 is about 30351.2452133352. The cubic root of 921198086 is about 973.0108333210.

The spelling of 921198086 in words is "nine hundred twenty-one million, one hundred ninety-eight thousand, eighty-six".