673121100 has 72 divisors (see below), whose sum is σ = 1950722368. Its totient is φ = 179208000.

The previous prime is 673121093. The next prime is 673121129. The reversal of 673121100 is 1121376.

673121100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234675 + ... + 237525.

Almost surely, 2^673121100 is an apocalyptic number.

673121100 is a gapful number since it is divisible by the number (60) 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 673121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975361184).

673121100 is an abundant number, since it is smaller than the sum of its proper divisors (1277601268).

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

673121100 is a wasteful number, since it uses less digits than its factorization.

673121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655 (or 3648 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 673121100 is about 25944.5774681339. The cubic root of 673121100 is about 876.3906485179.

Adding to 673121100 its reverse (1121376), we get a palindrome (674242476).

The spelling of 673121100 in words is "six hundred seventy-three million, one hundred twenty-one thousand, one hundred".