40809893 has 4 divisors (see below), whose sum is σ = 40872480. Its totient is φ = 40747308.

The previous prime is 40809863. The next prime is 40809913. The reversal of 40809893 is 39890804.

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 40809893 - 2⁶ = 40809829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40809893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40809823) 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, 30305 + ... + 31622.

It is an arithmetic number, because the mean of its divisors is an integer number (10218120).

Almost surely, 2^40809893 is an apocalyptic number.

It is an amenable number.

40809893 is a deficient number, since it is larger than the sum of its proper divisors (62587).

40809893 is an equidigital number, since it uses as much as digits as its factorization.

40809893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62586.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 40809893 is about 6388.2621267446. The cubic root of 40809893 is about 344.2879467774.

The spelling of 40809893 in words is "forty million, eight hundred nine thousand, eight hundred ninety-three".