693505989 has 16 divisors (see below), whose sum is σ = 1120818240. Its totient is φ = 420306480.

The previous prime is 693505987. The next prime is 693506039. The reversal of 693505989 is 989505396.

693505989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 693505989 - 2¹ = 693505987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693505987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1167222 + ... + 1167815.

It is an arithmetic number, because the mean of its divisors is an integer number (70051140).

Almost surely, 2^693505989 is an apocalyptic number.

It is an amenable number.

693505989 is a deficient number, since it is larger than the sum of its proper divisors (427312251).

693505989 is a wasteful number, since it uses less digits than its factorization.

693505989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335057 (or 2335051 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The square root of 693505989 is about 26334.5018749169. The cubic root of 693505989 is about 885.1497247399.

The spelling of 693505989 in words is "six hundred ninety-three million, five hundred five thousand, nine hundred eighty-nine".