694681 has 4 divisors (see below), whose sum is σ = 748132. Its totient is φ = 641232.

The previous prime is 694651. The next prime is 694717. The reversal of 694681 is 186496.

694681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259081 + 435600 = 509^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 694681 - 2⁵ = 694649 is a prime.

It is a super-2 number, since 2×694681² = 965163383522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (694651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26706 + ... + 26731.

It is an arithmetic number, because the mean of its divisors is an integer number (187033).

2⁶⁹⁴⁶⁸¹ is an apocalyptic number.

It is an amenable number.

694681 is a deficient number, since it is larger than the sum of its proper divisors (53451).

694681 is a wasteful number, since it uses less digits than its factorization.

694681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53450.

The product of its digits is 10368, while the sum is 34.

The square root of 694681 is about 833.4752545817. The cubic root of 694681 is about 88.5649347352.

The spelling of 694681 in words is "six hundred ninety-four thousand, six hundred eighty-one".