40017449 has 2 divisors, whose sum is σ = 40017450. Its totient is φ = 40017448.

The previous prime is 40017421. The next prime is 40017451. The reversal of 40017449 is 94471004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34727449 + 5290000 = 5893^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 40017449 - 2²⁰ = 38968873 is a prime.

Together with 40017451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40017409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20008724 + 20008725.

It is an arithmetic number, because the mean of its divisors is an integer number (20008725).

Almost surely, 2^40017449 is an apocalyptic number.

It is an amenable number.

40017449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40017449 is an equidigital number, since it uses as much as digits as its factorization.

40017449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40017449 is about 6325.9346345026. The cubic root of 40017449 is about 342.0449110566.

The spelling of 40017449 in words is "forty million, seventeen thousand, four hundred forty-nine".