40799917 has 4 divisors (see below), whose sum is σ = 40821340. Its totient is φ = 40778496.

The previous prime is 40799909. The next prime is 40799921. The reversal of 40799917 is 71999704.

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 1687401 + 39112516 = 1299^2 + 6254^2 .

It is a cyclic number.

It is not a de Polignac number, because 40799917 - 2³ = 40799909 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 (40799947) 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, 7542 + ... + 11767.

It is an arithmetic number, because the mean of its divisors is an integer number (10205335).

Almost surely, 2^40799917 is an apocalyptic number.

It is an amenable number.

40799917 is a deficient number, since it is larger than the sum of its proper divisors (21423).

40799917 is a wasteful number, since it uses less digits than its factorization.

40799917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21422.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 40799917 is about 6387.4812719882. The cubic root of 40799917 is about 344.2598907007.

The spelling of 40799917 in words is "forty million, seven hundred ninety-nine thousand, nine hundred seventeen".