699989 has 4 divisors (see below), whose sum is σ = 709920. Its totient is φ = 690060.

The previous prime is 699967. The next prime is 700001. The reversal of 699989 is 989996.

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 not a de Polignac number, because 699989 - 2⁸ = 699733 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4859 + ... + 5000.

It is an arithmetic number, because the mean of its divisors is an integer number (177480).

2⁶⁹⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

699989 is a deficient number, since it is larger than the sum of its proper divisors (9931).

699989 is an equidigital number, since it uses as much as digits as its factorization.

699989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9930.

The product of its digits is 314928, while the sum is 50.

The square root of 699989 is about 836.6534527509. The cubic root of 699989 is about 88.7899350793.

It can be divided in two parts, 69998 and 9, that added together give a palindrome (70007).

The spelling of 699989 in words is "six hundred ninety-nine thousand, nine hundred eighty-nine".