698739 has 8 divisors (see below), whose sum is σ = 942480. Its totient is φ = 460416.

The previous prime is 698729. The next prime is 698773. The reversal of 698739 is 937896.

It is a happy number.

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

It is not a de Polignac number, because 698739 - 2⁴ = 698723 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 698739.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698739.

It is not an unprimeable number, because it can be changed into a prime (698729) 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 7 ways as a sum of consecutive naturals, for example, 1042 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (117810).

2⁶⁹⁸⁷³⁹ is an apocalyptic number.

698739 is a deficient number, since it is larger than the sum of its proper divisors (243741).

698739 is a wasteful number, since it uses less digits than its factorization.

698739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709.

The product of its digits is 81648, while the sum is 42.

The square root of 698739 is about 835.9060952045. The cubic root of 698739 is about 88.7370516056.

The spelling of 698739 in words is "six hundred ninety-eight thousand, seven hundred thirty-nine".