693995609 has 8 divisors (see below), whose sum is σ = 696465000. Its totient is φ = 691531776.

The previous prime is 693995587. The next prime is 693995623. The reversal of 693995609 is 906599396.

It can be written as a sum of positive squares in 4 ways, for example, as 11323225 + 682672384 = 3365^2 + 26128^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 693995609 - 2²⁰ = 692947033 is a prime.

It is a super-2 number, since 2×693995609² = 963259810622561762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (693995689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555017 + ... + 556265.

It is an arithmetic number, because the mean of its divisors is an integer number (87058125).

Almost surely, 2^693995609 is an apocalyptic number.

It is an amenable number.

693995609 is a deficient number, since it is larger than the sum of its proper divisors (2469391).

693995609 is a wasteful number, since it uses less digits than its factorization.

693995609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779.

The product of its (nonzero) digits is 3542940, while the sum is 56.

The square root of 693995609 is about 26343.7964044668. The cubic root of 693995609 is about 885.3579830023.

The spelling of 693995609 in words is "six hundred ninety-three million, nine hundred ninety-five thousand, six hundred nine".