40669693 has 2 divisors, whose sum is σ = 40669694. Its totient is φ = 40669692.

The previous prime is 40669679. The next prime is 40669757. The reversal of 40669693 is 39696604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37970244 + 2699449 = 6162^2 + 1643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40669693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40669193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20334846 + 20334847.

It is an arithmetic number, because the mean of its divisors is an integer number (20334847).

Almost surely, 2^40669693 is an apocalyptic number.

It is an amenable number.

40669693 is a deficient number, since it is larger than the sum of its proper divisors (1).

40669693 is an equidigital number, since it uses as much as digits as its factorization.

40669693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 40669693 is about 6377.2794356214. The cubic root of 40669693 is about 343.8932340609.

The spelling of 40669693 in words is "forty million, six hundred sixty-nine thousand, six hundred ninety-three".