698990 has 8 divisors (see below), whose sum is σ = 1258200. Its totient is φ = 279592.

The previous prime is 698983. The next prime is 699001. The reversal of 698990 is 99896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698990.

It is an unprimeable number.

698990 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 34940 + ... + 34959.

It is an arithmetic number, because the mean of its divisors is an integer number (157275).

2⁶⁹⁸⁹⁹⁰ is an apocalyptic number.

698990 is a deficient number, since it is larger than the sum of its proper divisors (559210).

698990 is a wasteful number, since it uses less digits than its factorization.

698990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69906.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 698990 is about 836.0562182055. The cubic root of 698990 is about 88.7476756648.

The spelling of 698990 in words is "six hundred ninety-eight thousand, nine hundred ninety".