40259447 has 2 divisors, whose sum is σ = 40259448. Its totient is φ = 40259446.

The previous prime is 40259437. The next prime is 40259449. The reversal of 40259447 is 74495204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40259447 - 2¹⁰ = 40258423 is a prime.

Together with 40259449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40259449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20129723 + 20129724.

It is an arithmetic number, because the mean of its divisors is an integer number (20129724).

Almost surely, 2^40259447 is an apocalyptic number.

40259447 is a deficient number, since it is larger than the sum of its proper divisors (1).

40259447 is an equidigital number, since it uses as much as digits as its factorization.

40259447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 40259447 is about 6345.0332544440. The cubic root of 40259447 is about 342.7330099650.

The spelling of 40259447 in words is "forty million, two hundred fifty-nine thousand, four hundred forty-seven".