47744561 has 2 divisors, whose sum is σ = 47744562. Its totient is φ = 47744560.

The previous prime is 47744531. The next prime is 47744563. The reversal of 47744561 is 16544774.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47679025 + 65536 = 6905^2 + 256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47744561 is a prime.

Together with 47744563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47744563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23872280 + 23872281.

It is an arithmetic number, because the mean of its divisors is an integer number (23872281).

Almost surely, 2^47744561 is an apocalyptic number.

It is an amenable number.

47744561 is a deficient number, since it is larger than the sum of its proper divisors (1).

47744561 is an equidigital number, since it uses as much as digits as its factorization.

47744561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 38.

The square root of 47744561 is about 6909.7439171072. The cubic root of 47744561 is about 362.7783001202.

The spelling of 47744561 in words is "forty-seven million, seven hundred forty-four thousand, five hundred sixty-one".