699889 has 4 divisors (see below), whose sum is σ = 706420. Its totient is φ = 693360.

The previous prime is 699863. The next prime is 699931. The reversal of 699889 is 988996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 339889 + 360000 = 583^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 699889 - 2⁷ = 699761 is a prime.

It is a super-2 number, since 2×699889² = 979689224642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3102 + ... + 3319.

It is an arithmetic number, because the mean of its divisors is an integer number (176605).

2⁶⁹⁹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

699889 is a deficient number, since it is larger than the sum of its proper divisors (6531).

699889 is a wasteful number, since it uses less digits than its factorization.

699889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530.

The product of its digits is 279936, while the sum is 49.

The square root of 699889 is about 836.5936887163. The cubic root of 699889 is about 88.7857067193.

The spelling of 699889 in words is "six hundred ninety-nine thousand, eight hundred eighty-nine".