681373000 has 128 divisors (see below), whose sum is σ = 1988064000. Its totient is φ = 212352000.

The previous prime is 681372997. The next prime is 681373027. The reversal of 681373000 is 373186.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 681373000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72576 + ... + 81424.

It is an arithmetic number, because the mean of its divisors is an integer number (15531750).

Almost surely, 2^681373000 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 681373000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994032000).

681373000 is an abundant number, since it is smaller than the sum of its proper divisors (1306691000).

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

681373000 is a wasteful number, since it uses less digits than its factorization.

681373000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8888 (or 8874 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 681373000 is about 26103.1224185920. The cubic root of 681373000 is about 879.9573842999.

The spelling of 681373000 in words is "six hundred eighty-one million, three hundred seventy-three thousand".