168997500 has 360 divisors, whose sum is σ = 648167520. Its totient is φ = 36288000.

The previous prime is 168997483. The next prime is 168997501. The reversal of 168997500 is 5799861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168997501) 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 119 ways as a sum of consecutive naturals, for example, 4567482 + ... + 4567518.

Almost surely, 2^168997500 is an apocalyptic number.

168997500 is a gapful number since it is divisible by the number (10) 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 168997500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324083760).

168997500 is an abundant number, since it is smaller than the sum of its proper divisors (479170020).

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

168997500 is a wasteful number, since it uses less digits than its factorization.

168997500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 168997500 is about 12999.9038457982. The cubic root of 168997500 is about 552.8747551341.

The spelling of 168997500 in words is "one hundred sixty-eight million, nine hundred ninety-seven thousand, five hundred".