40694663 has 2 divisors, whose sum is σ = 40694664. Its totient is φ = 40694662.

The previous prime is 40694623. The next prime is 40694669. The reversal of 40694663 is 36649604.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40694663 - 2¹⁴ = 40678279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40694669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20347331 + 20347332.

It is an arithmetic number, because the mean of its divisors is an integer number (20347332).

Almost surely, 2^40694663 is an apocalyptic number.

40694663 is a deficient number, since it is larger than the sum of its proper divisors (1).

40694663 is an equidigital number, since it uses as much as digits as its factorization.

40694663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 40694663 is about 6379.2368665852. The cubic root of 40694663 is about 343.9635997856.

The spelling of 40694663 in words is "forty million, six hundred ninety-four thousand, six hundred sixty-three".