699869 has 4 divisors (see below), whose sum is σ = 702144. Its totient is φ = 697596.

The previous prime is 699863. The next prime is 699931. The reversal of 699869 is 968996.

699869 = 482² + 483² + 484².

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-699869 is a prime.

It is a super-2 number, since 2×699869² = 979633234322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (175536).

2⁶⁹⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

699869 is a deficient number, since it is larger than the sum of its proper divisors (2275).

699869 is a wasteful number, since it uses less digits than its factorization.

699869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274.

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

The square root of 699869 is about 836.5817353971. The cubic root of 699869 is about 88.7848609990.

The spelling of 699869 in words is "six hundred ninety-nine thousand, eight hundred sixty-nine".