40804123 has 4 divisors (see below), whose sum is σ = 40817088. Its totient is φ = 40791160.

The previous prime is 40804121. The next prime is 40804151. The reversal of 40804123 is 32140804.

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 40804123 - 2¹ = 40804121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40804094 and 40804103.

It is not an unprimeable number, because it can be changed into a prime (40804121) 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, 1590 + ... + 9172.

It is an arithmetic number, because the mean of its divisors is an integer number (10204272).

Almost surely, 2^40804123 is an apocalyptic number.

40804123 is a deficient number, since it is larger than the sum of its proper divisors (12965).

40804123 is an equidigital number, since it uses as much as digits as its factorization.

40804123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40804123 is about 6387.8105012594. The cubic root of 40804123 is about 344.2717200332.

Adding to 40804123 its reverse (32140804), we get a palindrome (72944927).

The spelling of 40804123 in words is "forty million, eight hundred four thousand, one hundred twenty-three".