696691 has 2 divisors, whose sum is σ = 696692. Its totient is φ = 696690.

The previous prime is 696679. The next prime is 696719. The reversal of 696691 is 196696.

696691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 696691 - 2⁵ = 696659 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 696691.

It is not a weakly prime, because it can be changed into another prime (696611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348345 + 348346.

It is an arithmetic number, because the mean of its divisors is an integer number (348346).

2⁶⁹⁶⁶⁹¹ is an apocalyptic number.

696691 is a deficient number, since it is larger than the sum of its proper divisors (1).

696691 is an equidigital number, since it uses as much as digits as its factorization.

696691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 696691 is about 834.6801782719. The cubic root of 696691 is about 88.6502708360.

Subtracting from 696691 its product of digits (17496), we obtain a triangular number (679195 = T₁₁₆₅).

The spelling of 696691 in words is "six hundred ninety-six thousand, six hundred ninety-one".