40549917 has 8 divisors (see below), whose sum is σ = 55931040. Its totient is φ = 26101040.

The previous prime is 40549909. The next prime is 40549963. The reversal of 40549917 is 71994504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40549917 - 2³ = 40549909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40549907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232959 + ... + 233132.

It is an arithmetic number, because the mean of its divisors is an integer number (6991380).

Almost surely, 2^40549917 is an apocalyptic number.

It is an amenable number.

40549917 is a deficient number, since it is larger than the sum of its proper divisors (15381123).

40549917 is a wasteful number, since it uses less digits than its factorization.

40549917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466123.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 40549917 is about 6367.8816728956. The cubic root of 40549917 is about 343.5553029913. Note that the first 3 decimals are identical.

The spelling of 40549917 in words is "forty million, five hundred forty-nine thousand, nine hundred seventeen".