699838 has 4 divisors (see below), whose sum is σ = 1049760. Its totient is φ = 349918.

The previous prime is 699823. The next prime is 699863. The reversal of 699838 is 838996.

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

It is a junction number, because it is equal to n+sod(n) for n = 699794 and 699803.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 174958 + ... + 174961.

It is an arithmetic number, because the mean of its divisors is an integer number (262440).

2⁶⁹⁹⁸³⁸ is an apocalyptic number.

699838 is a deficient number, since it is larger than the sum of its proper divisors (349922).

699838 is a wasteful number, since it uses less digits than its factorization.

699838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349921.

The product of its digits is 93312, while the sum is 43.

The square root of 699838 is about 836.5632074147. The cubic root of 699838 is about 88.7835501006.

The spelling of 699838 in words is "six hundred ninety-nine thousand, eight hundred thirty-eight".