40959909 has 6 divisors (see below), whose sum is σ = 59164326. Its totient is φ = 27306600.

The previous prime is 40959871. The next prime is 40959929. The reversal of 40959909 is 90995904.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 39727809 + 1232100 = 6303^2 + 1110^2 .

It is not a de Polignac number, because 40959909 - 2¹² = 40955813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40959929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2275542 + ... + 2275559.

It is an arithmetic number, because the mean of its divisors is an integer number (9860721).

Almost surely, 2^40959909 is an apocalyptic number.

It is an amenable number.

40959909 is a deficient number, since it is larger than the sum of its proper divisors (18204417).

40959909 is a wasteful number, since it uses less digits than its factorization.

40959909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4551107 (or 4551104 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 40959909 is about 6399.9928906211. The cubic root of 40959909 is about 344.7092951268.

The spelling of 40959909 in words is "forty million, nine hundred fifty-nine thousand, nine hundred nine".