40539019 has 4 divisors (see below), whose sum is σ = 40551840. Its totient is φ = 40526200.

The previous prime is 40539001. The next prime is 40539029. The reversal of 40539019 is 91093504.

40539019 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 40539019 - 2⁵ = 40538987 is a prime.

It is a super-2 number, since 2×40539019² = 3286824122964722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40539029) 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, 2094 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (10137960).

Almost surely, 2^40539019 is an apocalyptic number.

40539019 is a deficient number, since it is larger than the sum of its proper divisors (12821).

40539019 is an equidigital number, since it uses as much as digits as its factorization.

40539019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12820.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 40539019 is about 6367.0259148208. The cubic root of 40539019 is about 343.5245228120.

The spelling of 40539019 in words is "forty million, five hundred thirty-nine thousand, nineteen".