693163993 has 4 divisors (see below), whose sum is σ = 696191140. Its totient is φ = 690136848.

The previous prime is 693163979. The next prime is 693163997. The reversal of 693163993 is 399361396.

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 354493584 + 338670409 = 18828^2 + 18403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-693163993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (693163997) 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, 1513230 + ... + 1513687.

It is an arithmetic number, because the mean of its divisors is an integer number (174047785).

Almost surely, 2^693163993 is an apocalyptic number.

It is an amenable number.

693163993 is a deficient number, since it is larger than the sum of its proper divisors (3027147).

693163993 is a wasteful number, since it uses less digits than its factorization.

693163993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027146.

The product of its digits is 708588, while the sum is 49.

The square root of 693163993 is about 26328.0077673948. The cubic root of 693163993 is about 885.0041997098.

The spelling of 693163993 in words is "six hundred ninety-three million, one hundred sixty-three thousand, nine hundred ninety-three".