699988 has 12 divisors (see below), whose sum is σ = 1237600. Its totient is φ = 346392.

The previous prime is 699967. The next prime is 700001. The reversal of 699988 is 889996.

699988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438 + ... + 1261.

2⁶⁹⁹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

699988 is a deficient number, since it is larger than the sum of its proper divisors (537612).

699988 is a wasteful number, since it uses less digits than its factorization.

699988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1804 counting only the distinct ones).

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

The square root of 699988 is about 836.6528551317. The cubic root of 699988 is about 88.7898927976.

The spelling of 699988 in words is "six hundred ninety-nine thousand, nine hundred eighty-eight".