47775697 has 2 divisors, whose sum is σ = 47775698. Its totient is φ = 47775696.

The previous prime is 47775659. The next prime is 47775779. The reversal of 47775697 is 79657774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26255376 + 21520321 = 5124^2 + 4639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47775697 is a prime.

It is not a weakly prime, because it can be changed into another prime (47775197) 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, 23887848 + 23887849.

It is an arithmetic number, because the mean of its divisors is an integer number (23887849).

Almost surely, 2^47775697 is an apocalyptic number.

It is an amenable number.

47775697 is a deficient number, since it is larger than the sum of its proper divisors (1).

47775697 is an equidigital number, since it uses as much as digits as its factorization.

47775697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2593080, while the sum is 52.

The square root of 47775697 is about 6911.9966001149. The cubic root of 47775697 is about 362.8571433812.

The spelling of 47775697 in words is "forty-seven million, seven hundred seventy-five thousand, six hundred ninety-seven".