997492500 has 180 divisors, whose sum is σ = 3227191968. Its totient is φ = 259560000.

The previous prime is 997492499. The next prime is 997492511. The reversal of 997492500 is 5294799.

997492500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 966985 + ... + 968015.

Almost surely, 2^997492500 is an apocalyptic number.

997492500 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997492500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1613595984).

997492500 is an abundant number, since it is smaller than the sum of its proper divisors (2229699468).

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

997492500 is a wasteful number, since it uses less digits than its factorization.

997492500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 997492500 is about 31583.1046605618. The cubic root of 997492500 is about 999.1634670745.

The spelling of 997492500 in words is "nine hundred ninety-seven million, four hundred ninety-two thousand, five hundred".