40864091 has 2 divisors, whose sum is σ = 40864092. Its totient is φ = 40864090.

The previous prime is 40864069. The next prime is 40864127. The reversal of 40864091 is 19046804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40864091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40864001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20432045 + 20432046.

It is an arithmetic number, because the mean of its divisors is an integer number (20432046).

Almost surely, 2^40864091 is an apocalyptic number.

40864091 is a deficient number, since it is larger than the sum of its proper divisors (1).

40864091 is an equidigital number, since it uses as much as digits as its factorization.

40864091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40864091 is about 6392.5027180284. The cubic root of 40864091 is about 344.4402910780.

The spelling of 40864091 in words is "forty million, eight hundred sixty-four thousand, ninety-one".