2040395447 has 2 divisors, whose sum is σ = 2040395448. Its totient is φ = 2040395446.

The previous prime is 2040395353. The next prime is 2040395449. The reversal of 2040395447 is 7445930402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2040395447 - 2²⁶ = 1973286583 is a prime.

Together with 2040395449, it forms a pair of twin primes.

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 2040395447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040395449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020197723 + 1020197724.

It is an arithmetic number, because the mean of its divisors is an integer number (1020197724).

Almost surely, 2^2040395447 is an apocalyptic number.

2040395447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040395447 is an equidigital number, since it uses as much as digits as its factorization.

2040395447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 2040395447 is about 45170.7366222868. The cubic root of 2040395447 is about 1268.3470853976.

The spelling of 2040395447 in words is "two billion, forty million, three hundred ninety-five thousand, four hundred forty-seven".