699791 has 2 divisors, whose sum is σ = 699792. Its totient is φ = 699790.

The previous prime is 699767. The next prime is 699793. The reversal of 699791 is 197996.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 699791 - 2¹⁴ = 683407 is a prime.

It is a Sophie Germain prime.

Together with 699793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349895 + 349896.

It is an arithmetic number, because the mean of its divisors is an integer number (349896).

2⁶⁹⁹⁷⁹¹ is an apocalyptic number.

699791 is a deficient number, since it is larger than the sum of its proper divisors (1).

699791 is an equidigital number, since it uses as much as digits as its factorization.

699791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 699791 is about 836.5351158200. The cubic root of 699791 is about 88.7815625358.

The spelling of 699791 in words is "six hundred ninety-nine thousand, seven hundred ninety-one".