40908109 has 4 divisors (see below), whose sum is σ = 44627040. Its totient is φ = 37189180.

The previous prime is 40908107. The next prime is 40908113. The reversal of 40908109 is 90180904.

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 40908109 - 2¹ = 40908107 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 (40908107) 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, 1859449 + ... + 1859470.

It is an arithmetic number, because the mean of its divisors is an integer number (11156760).

Almost surely, 2^40908109 is an apocalyptic number.

It is an amenable number.

40908109 is a deficient number, since it is larger than the sum of its proper divisors (3718931).

40908109 is a wasteful number, since it uses less digits than its factorization.

40908109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718930.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 40908109 is about 6395.9447308431. The cubic root of 40908109 is about 344.5639214806.

The spelling of 40908109 in words is "forty million, nine hundred eight thousand, one hundred nine".