45815947 has 2 divisors, whose sum is σ = 45815948. Its totient is φ = 45815946.

The previous prime is 45815933. The next prime is 45815981. The reversal of 45815947 is 74951854.

45815947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45815947 is a prime.

It is not a weakly prime, because it can be changed into another prime (45815927) 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, 22907973 + 22907974.

It is an arithmetic number, because the mean of its divisors is an integer number (22907974).

Almost surely, 2^45815947 is an apocalyptic number.

45815947 is a deficient number, since it is larger than the sum of its proper divisors (1).

45815947 is an equidigital number, since it uses as much as digits as its factorization.

45815947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 45815947 is about 6768.7478162508. The cubic root of 45815947 is about 357.8262710018.

The spelling of 45815947 in words is "forty-five million, eight hundred fifteen thousand, nine hundred forty-seven".