693788393 has 2 divisors, whose sum is σ = 693788394. Its totient is φ = 693788392.

The previous prime is 693788351. The next prime is 693788437. The reversal of 693788393 is 393887396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547934464 + 145853929 = 23408^2 + 12077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-693788393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (693788323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346894196 + 346894197.

It is an arithmetic number, because the mean of its divisors is an integer number (346894197).

Almost surely, 2^693788393 is an apocalyptic number.

It is an amenable number.

693788393 is a deficient number, since it is larger than the sum of its proper divisors (1).

693788393 is an equidigital number, since it uses as much as digits as its factorization.

693788393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 56.

The square root of 693788393 is about 26339.8631925073. The cubic root of 693788393 is about 885.2698563149.

The spelling of 693788393 in words is "six hundred ninety-three million, seven hundred eighty-eight thousand, three hundred ninety-three".