681499 has 8 divisors (see below), whose sum is σ = 838880. Its totient is φ = 539136.

The previous prime is 681497. The next prime is 681521. The reversal of 681499 is 994186.

681499 is nontrivially palindromic in base 3.

681499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 681499 - 2¹ = 681497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3654 + ... + 3835.

It is an arithmetic number, because the mean of its divisors is an integer number (104860).

2⁶⁸¹⁴⁹⁹ is an apocalyptic number.

681499 is a deficient number, since it is larger than the sum of its proper divisors (157381).

681499 is a wasteful number, since it uses less digits than its factorization.

681499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509.

The product of its digits is 15552, while the sum is 37.

The square root of 681499 is about 825.5295270310. The cubic root of 681499 is about 88.0011621747.

The spelling of 681499 in words is "six hundred eighty-one thousand, four hundred ninety-nine".