40408547 has 2 divisors, whose sum is σ = 40408548. Its totient is φ = 40408546.

The previous prime is 40408523. The next prime is 40408553. The reversal of 40408547 is 74580404.

40408547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40408547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40408517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20204273 + 20204274.

It is an arithmetic number, because the mean of its divisors is an integer number (20204274).

Almost surely, 2^40408547 is an apocalyptic number.

40408547 is a deficient number, since it is larger than the sum of its proper divisors (1).

40408547 is an equidigital number, since it uses as much as digits as its factorization.

40408547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 40408547 is about 6356.7717435818. The cubic root of 40408547 is about 343.1555901761.

The spelling of 40408547 in words is "forty million, four hundred eight thousand, five hundred forty-seven".