40118593 has 4 divisors (see below), whose sum is σ = 40136580. Its totient is φ = 40100608.

The previous prime is 40118591. The next prime is 40118641. The reversal of 40118593 is 39581104.

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 33732864 + 6385729 = 5808^2 + 2527^2 .

It is a cyclic number.

It is not a de Polignac number, because 40118593 - 2¹ = 40118591 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40118591) 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, 5080 + ... + 10297.

It is an arithmetic number, because the mean of its divisors is an integer number (10034145).

Almost surely, 2^40118593 is an apocalyptic number.

It is an amenable number.

40118593 is a deficient number, since it is larger than the sum of its proper divisors (17987).

40118593 is a wasteful number, since it uses less digits than its factorization.

40118593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17986.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 40118593 is about 6333.9239812300. The cubic root of 40118593 is about 342.3328411578.

Adding to 40118593 its reverse (39581104), we get a palindrome (79699697).

The spelling of 40118593 in words is "forty million, one hundred eighteen thousand, five hundred ninety-three".