997350090 has 128 divisors (see below), whose sum is σ = 2787609600. Its totient is φ = 225815040.

The previous prime is 997350089. The next prime is 997350097. The reversal of 997350090 is 90053799.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (997350097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 456621 + ... + 458799.

It is an arithmetic number, because the mean of its divisors is an integer number (21778200).

Almost surely, 2^997350090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997350090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393804800).

997350090 is an abundant number, since it is smaller than the sum of its proper divisors (1790259510).

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

997350090 is a wasteful number, since it uses less digits than its factorization.

997350090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 997350090 is about 31580.8500518906. The cubic root of 997350090 is about 999.1159152912.

The spelling of 997350090 in words is "nine hundred ninety-seven million, three hundred fifty thousand, ninety".