699697 has 2 divisors, whose sum is σ = 699698. Its totient is φ = 699696.

The previous prime is 699649. The next prime is 699709. The reversal of 699697 is 796996.

699697 is nontrivially palindromic in base 9.

699697 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., 430336 + 269361 = 656^2 + 519^2 .

It is a cyclic number.

It is not a de Polignac number, because 699697 - 2¹⁵ = 666929 is a prime.

It is not a weakly prime, because it can be changed into another prime (699617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349848 + 349849.

It is an arithmetic number, because the mean of its divisors is an integer number (349849).

2⁶⁹⁹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

699697 is a deficient number, since it is larger than the sum of its proper divisors (1).

699697 is an equidigital number, since it uses as much as digits as its factorization.

699697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 699697 is about 836.4789298004. The cubic root of 699697 is about 88.7775871390. Note that the first 3 decimals are identical.

The spelling of 699697 in words is "six hundred ninety-nine thousand, six hundred ninety-seven".