40605917 has 4 divisors (see below), whose sum is σ = 44297376. Its totient is φ = 36914460.

The previous prime is 40605893. The next prime is 40605919. The reversal of 40605917 is 71950604.

It is a happy number.

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 not a de Polignac number, because 40605917 - 2⁶ = 40605853 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 (40605919) 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, 1845713 + ... + 1845734.

It is an arithmetic number, because the mean of its divisors is an integer number (11074344).

Almost surely, 2^40605917 is an apocalyptic number.

It is an amenable number.

40605917 is a deficient number, since it is larger than the sum of its proper divisors (3691459).

40605917 is a wasteful number, since it uses less digits than its factorization.

40605917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691458.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 40605917 is about 6372.2772224692. The cubic root of 40605917 is about 343.7133817963.

The spelling of 40605917 in words is "forty million, six hundred five thousand, nine hundred seventeen".