40062809 has 2 divisors, whose sum is σ = 40062810. Its totient is φ = 40062808.

The previous prime is 40062797. The next prime is 40062877. The reversal of 40062809 is 90826004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 120409 = 6320^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 40062809 - 2⁸ = 40062553 is a prime.

It is not a weakly prime, because it can be changed into another prime (40062889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20031404 + 20031405.

It is an arithmetic number, because the mean of its divisors is an integer number (20031405).

Almost surely, 2^40062809 is an apocalyptic number.

It is an amenable number.

40062809 is a deficient number, since it is larger than the sum of its proper divisors (1).

40062809 is an equidigital number, since it uses as much as digits as its factorization.

40062809 is an evil number, because the sum of its binary digits is even.

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

The square root of 40062809 is about 6329.5188600714. The cubic root of 40062809 is about 342.1740988573.

The spelling of 40062809 in words is "forty million, sixty-two thousand, eight hundred nine".