693989 has 2 divisors, whose sum is σ = 693990. Its totient is φ = 693988.

The previous prime is 693967. The next prime is 694019. The reversal of 693989 is 989396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 100 = 833^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 693989 - 2⁸ = 693733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (693089) 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 as a sum of consecutive naturals, namely, 346994 + 346995.

It is an arithmetic number, because the mean of its divisors is an integer number (346995).

2⁶⁹³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

693989 is a deficient number, since it is larger than the sum of its proper divisors (1).

693989 is an equidigital number, since it uses as much as digits as its factorization.

693989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 44.

The square root of 693989 is about 833.0600218472. The cubic root of 693989 is about 88.5355172538.

The spelling of 693989 in words is "six hundred ninety-three thousand, nine hundred eighty-nine".