693488645 has 6 divisors (see below), whose sum is σ = 832257042. Its totient is φ = 554743808.

The previous prime is 693488641. The next prime is 693488647. The reversal of 693488645 is 546884396.

It can be written as a sum of positive squares in 3 ways, for example, as 175880644 + 517608001 = 13262^2 + 22751^2 .

It is not a de Polignac number, because 693488645 - 2² = 693488641 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 (693488641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52997 + ... + 64773.

It is an arithmetic number, because the mean of its divisors is an integer number (138709507).

Almost surely, 2^693488645 is an apocalyptic number.

It is an amenable number.

693488645 is a deficient number, since it is larger than the sum of its proper divisors (138768397).

693488645 is an frugal number, since it uses more digits than its factorization.

693488645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23559 (or 11782 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The square root of 693488645 is about 26334.1725710150. The cubic root of 693488645 is about 885.1423457290.

The spelling of 693488645 in words is "six hundred ninety-three million, four hundred eighty-eight thousand, six hundred forty-five".