306542668693 has 2 divisors, whose sum is σ = 306542668694. Its totient is φ = 306542668692.

The previous prime is 306542668687. The next prime is 306542668709. The reversal of 306542668693 is 396866245603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298298391889 + 8244276804 = 546167^2 + 90798^2 .

It is a cyclic number.

It is not a de Polignac number, because 306542668693 - 2²¹ = 306540571541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306542668603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153271334346 + 153271334347.

It is an arithmetic number, because the mean of its divisors is an integer number (153271334347).

Almost surely, 2^306542668693 is an apocalyptic number.

It is an amenable number.

306542668693 is a deficient number, since it is larger than the sum of its proper divisors (1).

306542668693 is an equidigital number, since it uses as much as digits as its factorization.

306542668693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33592320, while the sum is 58.

The spelling of 306542668693 in words is "three hundred six billion, five hundred forty-two million, six hundred sixty-eight thousand, six hundred ninety-three".