40459813 has 4 divisors (see below), whose sum is σ = 42839820. Its totient is φ = 38079808.

The previous prime is 40459807. The next prime is 40459823. The reversal of 40459813 is 31895404.

40459813 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.

It can be written as a sum of positive squares in 2 ways, for example, as 25583364 + 14876449 = 5058^2 + 3857^2 .

It is a cyclic number.

It is not a de Polignac number, because 40459813 - 2²¹ = 38362661 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 (40459823) 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, 1189978 + ... + 1190011.

It is an arithmetic number, because the mean of its divisors is an integer number (10709955).

Almost surely, 2^40459813 is an apocalyptic number.

It is an amenable number.

40459813 is a deficient number, since it is larger than the sum of its proper divisors (2380007).

40459813 is a wasteful number, since it uses less digits than its factorization.

40459813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380006.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40459813 is about 6360.8028581304. The cubic root of 40459813 is about 343.3006484318.

The spelling of 40459813 in words is "forty million, four hundred fifty-nine thousand, eight hundred thirteen".