45144947 has 2 divisors, whose sum is σ = 45144948. Its totient is φ = 45144946.

The previous prime is 45144937. The next prime is 45144997. The reversal of 45144947 is 74944154.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45144947 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45144947.

It is not a weakly prime, because it can be changed into another prime (45144917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22572473 + 22572474.

It is an arithmetic number, because the mean of its divisors is an integer number (22572474).

Almost surely, 2^45144947 is an apocalyptic number.

45144947 is a deficient number, since it is larger than the sum of its proper divisors (1).

45144947 is an equidigital number, since it uses as much as digits as its factorization.

45144947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 45144947 is about 6718.9989581782. The cubic root of 45144947 is about 356.0708181927.

The spelling of 45144947 in words is "forty-five million, one hundred forty-four thousand, nine hundred forty-seven".