40472447 has 2 divisors, whose sum is σ = 40472448. Its totient is φ = 40472446.

The previous prime is 40472353. The next prime is 40472449. The reversal of 40472447 is 74427404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40472447 - 2¹⁰ = 40471423 is a prime.

Together with 40472449, 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 (40472449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20236223 + 20236224.

It is an arithmetic number, because the mean of its divisors is an integer number (20236224).

Almost surely, 2^40472447 is an apocalyptic number.

40472447 is a deficient number, since it is larger than the sum of its proper divisors (1).

40472447 is an equidigital number, since it uses as much as digits as its factorization.

40472447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 40472447 is about 6361.7958942424. The cubic root of 40472447 is about 343.3363777864.

The spelling of 40472447 in words is "forty million, four hundred seventy-two thousand, four hundred forty-seven".