681398094 has 32 divisors (see below), whose sum is σ = 1518239520. Its totient is φ = 202430592.

The previous prime is 681398077. The next prime is 681398099. The reversal of 681398094 is 490893186.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681398099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148357 + ... + 152880.

It is an arithmetic number, because the mean of its divisors is an integer number (47444985).

Almost surely, 2^681398094 is an apocalyptic number.

681398094 is an abundant number, since it is smaller than the sum of its proper divisors (836841426).

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

681398094 is a wasteful number, since it uses less digits than its factorization.

681398094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301284.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 681398094 is about 26103.6030846318. The cubic root of 681398094 is about 879.9681866943.

The spelling of 681398094 in words is "six hundred eighty-one million, three hundred ninety-eight thousand, ninety-four".