693943369649 has 2 divisors, whose sum is σ = 693943369650. Its totient is φ = 693943369648.

The previous prime is 693943369643. The next prime is 693943369663. The reversal of 693943369649 is 946963349396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693794041249 + 149328400 = 832943^2 + 12220^2 .

It is a cyclic number.

It is not a de Polignac number, because 693943369649 - 2⁴ = 693943369633 is a prime.

It is not a weakly prime, because it can be changed into another prime (693943369643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346971684824 + 346971684825.

It is an arithmetic number, because the mean of its divisors is an integer number (346971684825).

Almost surely, 2^693943369649 is an apocalyptic number.

It is an amenable number.

693943369649 is a deficient number, since it is larger than the sum of its proper divisors (1).

693943369649 is an equidigital number, since it uses as much as digits as its factorization.

693943369649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612220032, while the sum is 71.

The spelling of 693943369649 in words is "six hundred ninety-three billion, nine hundred forty-three million, three hundred sixty-nine thousand, six hundred forty-nine".