40719891 has 8 divisors (see below), whose sum is σ = 54324160. Its totient is φ = 27131112.

The previous prime is 40719881. The next prime is 40719901. The reversal of 40719891 is 19891704.

It is a happy number.

40719891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40719881) and next prime (40719901).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40719891 - 2⁵ = 40719859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40719841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5520 + ... + 10578.

It is an arithmetic number, because the mean of its divisors is an integer number (6790520).

Almost surely, 2^40719891 is an apocalyptic number.

40719891 is a deficient number, since it is larger than the sum of its proper divisors (13604269).

40719891 is a wasteful number, since it uses less digits than its factorization.

40719891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7745.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 40719891 is about 6381.2139127285. The cubic root of 40719891 is about 344.0346633314.

The spelling of 40719891 in words is "forty million, seven hundred nineteen thousand, eight hundred ninety-one".