47728771 has 2 divisors, whose sum is σ = 47728772. Its totient is φ = 47728770.

The previous prime is 47728729. The next prime is 47728781. The reversal of 47728771 is 17782774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47728771 - 2¹³ = 47720579 is a prime.

It is not a weakly prime, because it can be changed into another prime (47728711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23864385 + 23864386.

It is an arithmetic number, because the mean of its divisors is an integer number (23864386).

Almost surely, 2^47728771 is an apocalyptic number.

47728771 is a deficient number, since it is larger than the sum of its proper divisors (1).

47728771 is an equidigital number, since it uses as much as digits as its factorization.

47728771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153664, while the sum is 43.

The square root of 47728771 is about 6908.6012332454. The cubic root of 47728771 is about 362.7383032366.

The spelling of 47728771 in words is "forty-seven million, seven hundred twenty-eight thousand, seven hundred seventy-one".