40086691 has 4 divisors (see below), whose sum is σ = 40100400. Its totient is φ = 40072984.

The previous prime is 40086659. The next prime is 40086701. The reversal of 40086691 is 19668004.

40086691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40086691 - 2⁵ = 40086659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40086601) 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 3 ways as a sum of consecutive naturals, for example, 511 + ... + 8968.

It is an arithmetic number, because the mean of its divisors is an integer number (10025100).

Almost surely, 2^40086691 is an apocalyptic number.

40086691 is a deficient number, since it is larger than the sum of its proper divisors (13709).

40086691 is an equidigital number, since it uses as much as digits as its factorization.

40086691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13708.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 40086691 is about 6331.4051363027. The cubic root of 40086691 is about 342.2420769380.

The spelling of 40086691 in words is "forty million, eighty-six thousand, six hundred ninety-one".