997164920 has 64 divisors (see below), whose sum is σ = 2399284800. Its totient is φ = 371660800.

The previous prime is 997164901. The next prime is 997164929. The reversal of 997164920 is 29461799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997164929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61421 + ... + 75939.

It is an arithmetic number, because the mean of its divisors is an integer number (37488825).

Almost surely, 2^997164920 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 997164920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199642400).

997164920 is an abundant number, since it is smaller than the sum of its proper divisors (1402119880).

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

997164920 is a wasteful number, since it uses less digits than its factorization.

997164920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14648 (or 14644 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 997164920 is about 31577.9182341078. The cubic root of 997164920 is about 999.0540788486.

The spelling of 997164920 in words is "nine hundred ninety-seven million, one hundred sixty-four thousand, nine hundred twenty".