41640691 has 2 divisors, whose sum is σ = 41640692. Its totient is φ = 41640690.

The previous prime is 41640631. The next prime is 41640743. The reversal of 41640691 is 19604614.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 41640691 - 2¹³ = 41632499 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41640611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20820345 + 20820346.

It is an arithmetic number, because the mean of its divisors is an integer number (20820346).

Almost surely, 2^41640691 is an apocalyptic number.

41640691 is a deficient number, since it is larger than the sum of its proper divisors (1).

41640691 is an equidigital number, since it uses as much as digits as its factorization.

41640691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 41640691 is about 6452.9598635045. The cubic root of 41640691 is about 346.6085801140.

The spelling of 41640691 in words is "forty-one million, six hundred forty thousand, six hundred ninety-one".