40916991 has 4 divisors (see below), whose sum is σ = 54555992. Its totient is φ = 27277992.

The previous prime is 40916963. The next prime is 40917001. The reversal of 40916991 is 19961904.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40916991 - 2⁵ = 40916959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40916791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6819496 + ... + 6819501.

It is an arithmetic number, because the mean of its divisors is an integer number (13638998).

Almost surely, 2^40916991 is an apocalyptic number.

40916991 is a deficient number, since it is larger than the sum of its proper divisors (13639001).

40916991 is a wasteful number, since it uses less digits than its factorization.

40916991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13639000.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 40916991 is about 6396.6390393706. The cubic root of 40916991 is about 344.5888570037.

The spelling of 40916991 in words is "forty million, nine hundred sixteen thousand, nine hundred ninety-one".