693736389 has 6 divisors (see below), whose sum is σ = 1002063686. Its totient is φ = 462490920.

The previous prime is 693736363. The next prime is 693736397. The reversal of 693736389 is 983637396.

693736389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 692216100 + 1520289 = 26310^2 + 1233^2 .

It is not a de Polignac number, because 693736389 - 2⁷ = 693736261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693736349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38540902 + ... + 38540919.

Almost surely, 2^693736389 is an apocalyptic number.

It is an amenable number.

693736389 is a deficient number, since it is larger than the sum of its proper divisors (308327297).

693736389 is a wasteful number, since it uses less digits than its factorization.

693736389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77081827 (or 77081824 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The square root of 693736389 is about 26338.8760010749. The cubic root of 693736389 is about 885.2477368309.

The spelling of 693736389 in words is "six hundred ninety-three million, seven hundred thirty-six thousand, three hundred eighty-nine".