693646645 has 8 divisors (see below), whose sum is σ = 844799904. Its totient is φ = 546634704.

The previous prime is 693646643. The next prime is 693646711. The reversal of 693646645 is 546646396.

It is a happy number.

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 693646645 - 2¹ = 693646643 is a prime.

It is a super-2 number, since 2×693646645² = 962291336239512050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693646643) 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, 1034959 + ... + 1035628.

It is an arithmetic number, because the mean of its divisors is an integer number (105599988).

Almost surely, 2^693646645 is an apocalyptic number.

It is an amenable number.

693646645 is a deficient number, since it is larger than the sum of its proper divisors (151153259).

693646645 is a wasteful number, since it uses less digits than its factorization.

693646645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070659.

The product of its digits is 2799360, while the sum is 49.

The square root of 693646645 is about 26337.1723045584. The cubic root of 693646645 is about 885.2095623407.

The spelling of 693646645 in words is "six hundred ninety-three million, six hundred forty-six thousand, six hundred forty-five".