693630563621 has 2 divisors, whose sum is σ = 693630563622. Its totient is φ = 693630563620.

The previous prime is 693630563599. The next prime is 693630563711. The reversal of 693630563621 is 126365036396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583795324225 + 109835239396 = 764065^2 + 331414^2 .

It is a cyclic number.

It is not a de Polignac number, because 693630563621 - 2⁶ = 693630563557 is a prime.

It is a super-2 number, since 2×693630563621² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 693630563621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (693630563221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346815281810 + 346815281811.

It is an arithmetic number, because the mean of its divisors is an integer number (346815281811).

Almost surely, 2^693630563621 is an apocalyptic number.

It is an amenable number.

693630563621 is a deficient number, since it is larger than the sum of its proper divisors (1).

693630563621 is an equidigital number, since it uses as much as digits as its factorization.

693630563621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3149280, while the sum is 50.

The spelling of 693630563621 in words is "six hundred ninety-three billion, six hundred thirty million, five hundred sixty-three thousand, six hundred twenty-one".