693505397 has 4 divisors (see below), whose sum is σ = 746851980. Its totient is φ = 640158816.

The previous prime is 693505381. The next prime is 693505399. The reversal of 693505397 is 793505396.

693505397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 230007556 + 463497841 = 15166^2 + 21529^2 .

It is a cyclic number.

It is not a de Polignac number, because 693505397 - 2⁴ = 693505381 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 (693505399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26673272 + ... + 26673297.

It is an arithmetic number, because the mean of its divisors is an integer number (186712995).

Almost surely, 2^693505397 is an apocalyptic number.

It is an amenable number.

693505397 is a deficient number, since it is larger than the sum of its proper divisors (53346583).

693505397 is a wasteful number, since it uses less digits than its factorization.

693505397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53346582.

The product of its (nonzero) digits is 765450, while the sum is 47.

The square root of 693505397 is about 26334.4906349069. The cubic root of 693505397 is about 885.1494728753.

Subtracting 693505397 from its reverse (793505396), we obtain a palindrome (99999999).

It can be divided in two parts, 69350 and 5397, that added together give a palindrome (74747).

The spelling of 693505397 in words is "six hundred ninety-three million, five hundred five thousand, three hundred ninety-seven".