699990 has 16 divisors (see below), whose sum is σ = 1680048. Its totient is φ = 186656.

The previous prime is 699967. The next prime is 700001. The reversal of 699990 is 99996.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11637 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (105003).

2⁶⁹⁹⁹⁹⁰ is an apocalyptic number.

699990 is an abundant number, since it is smaller than the sum of its proper divisors (980058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

699990 is a wasteful number, since it uses less digits than its factorization.

699990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23343.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 699990 is about 836.6540503697. The cubic root of 699990 is about 88.7899773608.

The spelling of 699990 in words is "six hundred ninety-nine thousand, nine hundred ninety".