699391 has 16 divisors (see below), whose sum is σ = 903168. Its totient is φ = 525600.

The previous prime is 699383. The next prime is 699401. The reversal of 699391 is 193996.

It is a cyclic number.

It is not a de Polignac number, because 699391 - 2³ = 699383 is a prime.

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 699391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2241 + ... + 2533.

It is an arithmetic number, because the mean of its divisors is an integer number (56448).

2⁶⁹⁹³⁹¹ is an apocalyptic number.

699391 is a deficient number, since it is larger than the sum of its proper divisors (203777).

699391 is a wasteful number, since it uses less digits than its factorization.

699391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its digits is 13122, while the sum is 37.

The square root of 699391 is about 836.2960002296. The cubic root of 699391 is about 88.7646434873.

The spelling of 699391 in words is "six hundred ninety-nine thousand, three hundred ninety-one".