921197088 has 144 divisors (see below), whose sum is σ = 3170119680. Its totient is φ = 247707648.

The previous prime is 921197087. The next prime is 921197089. The reversal of 921197088 is 880791129.

It is an interprime number because it is at equal distance from previous prime (921197087) and next prime (921197089).

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (921197087) 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 23 ways as a sum of consecutive naturals, for example, 20833 + ... + 47711.

It is an arithmetic number, because the mean of its divisors is an integer number (22014720).

Almost surely, 2^921197088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921197088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585059840).

921197088 is an abundant number, since it is smaller than the sum of its proper divisors (2248922592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921197088 is a wasteful number, since it uses less digits than its factorization.

921197088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26919 (or 26908 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 921197088 is about 30351.2287724896. The cubic root of 921197088 is about 973.0104819434.

The spelling of 921197088 in words is "nine hundred twenty-one million, one hundred ninety-seven thousand, eighty-eight".