696781 has 4 divisors (see below), whose sum is σ = 704700. Its totient is φ = 688864.

The previous prime is 696763. The next prime is 696793. The reversal of 696781 is 187696.

696781 is nontrivially palindromic in base 9.

696781 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 111556 + 585225 = 334^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 696781 - 2⁷ = 696653 is a prime.

It is a super-2 number, since 2×696781² = 971007523922, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 696781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696721) 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, 3826 + ... + 4003.

It is an arithmetic number, because the mean of its divisors is an integer number (176175).

2⁶⁹⁶⁷⁸¹ is an apocalyptic number.

It is an amenable number.

696781 is a deficient number, since it is larger than the sum of its proper divisors (7919).

696781 is an equidigital number, since it uses as much as digits as its factorization.

696781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7918.

The product of its digits is 18144, while the sum is 37.

The square root of 696781 is about 834.7340893961. The cubic root of 696781 is about 88.6540880141.

The spelling of 696781 in words is "six hundred ninety-six thousand, seven hundred eighty-one".