40018117 has 4 divisors (see below), whose sum is σ = 41309056. Its totient is φ = 38727180.

The previous prime is 40018109. The next prime is 40018157. The reversal of 40018117 is 71181004.

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 40018117 - 2³ = 40018109 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 (40018157) 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, 645423 + ... + 645484.

It is an arithmetic number, because the mean of its divisors is an integer number (10327264).

Almost surely, 2^40018117 is an apocalyptic number.

It is an amenable number.

40018117 is a deficient number, since it is larger than the sum of its proper divisors (1290939).

40018117 is a wasteful number, since it uses less digits than its factorization.

40018117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290938.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 40018117 is about 6325.9874328045. The cubic root of 40018117 is about 342.0468142658.

The spelling of 40018117 in words is "forty million, eighteen thousand, one hundred seventeen".