40317689 has 4 divisors (see below), whose sum is σ = 42070656. Its totient is φ = 38564724.

The previous prime is 40317649. The next prime is 40317691. The reversal of 40317689 is 98671304.

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 40317689 - 2¹⁶ = 40252153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40317619) 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, 876449 + ... + 876494.

It is an arithmetic number, because the mean of its divisors is an integer number (10517664).

Almost surely, 2^40317689 is an apocalyptic number.

It is an amenable number.

40317689 is a deficient number, since it is larger than the sum of its proper divisors (1752967).

40317689 is a wasteful number, since it uses less digits than its factorization.

40317689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752966.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 40317689 is about 6349.6211698022. The cubic root of 40317689 is about 342.8982038042.

The spelling of 40317689 in words is "forty million, three hundred seventeen thousand, six hundred eighty-nine".