40559869 has 4 divisors (see below), whose sum is σ = 46354144. Its totient is φ = 34765596.

The previous prime is 40559867. The next prime is 40559887. The reversal of 40559869 is 96895504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40559869 - 2¹ = 40559867 is a prime.

It is a super-2 number, since 2×40559869² = 3290205946594322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40559861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2897127 + ... + 2897140.

It is an arithmetic number, because the mean of its divisors is an integer number (11588536).

Almost surely, 2^40559869 is an apocalyptic number.

It is an amenable number.

40559869 is a deficient number, since it is larger than the sum of its proper divisors (5794275).

40559869 is an equidigital number, since it uses as much as digits as its factorization.

40559869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794274.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 40559869 is about 6368.6630465114. The cubic root of 40559869 is about 343.5834064825.

It can be divided in two parts, 4055 and 9869, that added together give a square (13924 = 118²).

The spelling of 40559869 in words is "forty million, five hundred fifty-nine thousand, eight hundred sixty-nine".