42668693 has 2 divisors, whose sum is σ = 42668694. Its totient is φ = 42668692.

The previous prime is 42668629. The next prime is 42668713. The reversal of 42668693 is 39686624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22972849 + 19695844 = 4793^2 + 4438^2 .

It is a cyclic number.

It is not a de Polignac number, because 42668693 - 2⁶ = 42668629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42668293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21334346 + 21334347.

It is an arithmetic number, because the mean of its divisors is an integer number (21334347).

Almost surely, 2^42668693 is an apocalyptic number.

It is an amenable number.

42668693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42668693 is an equidigital number, since it uses as much as digits as its factorization.

42668693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The square root of 42668693 is about 6532.1277544151. The cubic root of 42668693 is about 349.4377175732.

The spelling of 42668693 in words is "forty-two million, six hundred sixty-eight thousand, six hundred ninety-three".