47127749 has 2 divisors, whose sum is σ = 47127750. Its totient is φ = 47127748.

The previous prime is 47127727. The next prime is 47127797. The reversal of 47127749 is 94772174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27899524 + 19228225 = 5282^2 + 4385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47127749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47127709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23563874 + 23563875.

It is an arithmetic number, because the mean of its divisors is an integer number (23563875).

Almost surely, 2^47127749 is an apocalyptic number.

It is an amenable number.

47127749 is a deficient number, since it is larger than the sum of its proper divisors (1).

47127749 is an equidigital number, since it uses as much as digits as its factorization.

47127749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 41.

The square root of 47127749 is about 6864.9653313036. The cubic root of 47127749 is about 361.2092795423.

The spelling of 47127749 in words is "forty-seven million, one hundred twenty-seven thousand, seven hundred forty-nine".