40108493 has 4 divisors (see below), whose sum is σ = 40340508. Its totient is φ = 39876480.

The previous prime is 40108483. The next prime is 40108499. The reversal of 40108493 is 39480104.

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 35081929 + 5026564 = 5923^2 + 2242^2 .

It is a cyclic number.

It is not a de Polignac number, because 40108493 - 2¹² = 40104397 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 (40108499) 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, 115748 + ... + 116093.

It is an arithmetic number, because the mean of its divisors is an integer number (10085127).

Almost surely, 2^40108493 is an apocalyptic number.

It is an amenable number.

40108493 is a deficient number, since it is larger than the sum of its proper divisors (232015).

40108493 is a wasteful number, since it uses less digits than its factorization.

40108493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232014.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40108493 is about 6333.1266369780. The cubic root of 40108493 is about 342.3041109055.

Adding to 40108493 its reverse (39480104), we get a palindrome (79588597).

The spelling of 40108493 in words is "forty million, one hundred eight thousand, four hundred ninety-three".