693442409 has 12 divisors (see below), whose sum is σ = 764444100. Its totient is φ = 628557600.

The previous prime is 693442397. The next prime is 693442417. The reversal of 693442409 is 904244396.

693442409 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 2 ways, for example, as 198246400 + 495196009 = 14080^2 + 22253^2 .

It is not a de Polignac number, because 693442409 - 2²⁴ = 676665193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (693442109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34019 + ... + 50439.

It is an arithmetic number, because the mean of its divisors is an integer number (63703675).

Almost surely, 2^693442409 is an apocalyptic number.

It is an amenable number.

693442409 is a deficient number, since it is larger than the sum of its proper divisors (71001691).

693442409 is a wasteful number, since it uses less digits than its factorization.

693442409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16792 (or 16781 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 693442409 is about 26333.2946856256. The cubic root of 693442409 is about 885.1226740053.

The spelling of 693442409 in words is "six hundred ninety-three million, four hundred forty-two thousand, four hundred nine".