696989 has 2 divisors, whose sum is σ = 696990. Its totient is φ = 696988.

The previous prime is 696961. The next prime is 696991. The reversal of 696989 is 989696.

It is a happy number.

696989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403225 + 293764 = 635^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 696989 - 2¹² = 692893 is a prime.

It is a super-2 number, since 2×696989² = 971587332242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 696991, it forms a pair of twin primes.

It is a Chen prime.

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

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 696989.

It is not a weakly prime, because it can be changed into another prime (696929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348494 + 348495.

It is an arithmetic number, because the mean of its divisors is an integer number (348495).

2⁶⁹⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

696989 is a deficient number, since it is larger than the sum of its proper divisors (1).

696989 is an equidigital number, since it uses as much as digits as its factorization.

696989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 696989 is about 834.8586706743. The cubic root of 696989 is about 88.6629086792.

The spelling of 696989 in words is "six hundred ninety-six thousand, nine hundred eighty-nine".