40896809 has 2 divisors, whose sum is σ = 40896810. Its totient is φ = 40896808.

The previous prime is 40896767. The next prime is 40896833. The reversal of 40896809 is 90869804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40896025 + 784 = 6395^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 40896809 - 2²⁴ = 24119593 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40896809.

It is not a weakly prime, because it can be changed into another prime (40896899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20448404 + 20448405.

It is an arithmetic number, because the mean of its divisors is an integer number (20448405).

Almost surely, 2^40896809 is an apocalyptic number.

It is an amenable number.

40896809 is a deficient number, since it is larger than the sum of its proper divisors (1).

40896809 is an equidigital number, since it uses as much as digits as its factorization.

40896809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 40896809 is about 6395.0612975952. The cubic root of 40896809 is about 344.5321923934.

The spelling of 40896809 in words is "forty million, eight hundred ninety-six thousand, eight hundred nine".