47791771 has 2 divisors, whose sum is σ = 47791772. Its totient is φ = 47791770.

The previous prime is 47791759. The next prime is 47791781. The reversal of 47791771 is 17719774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47791771 - 2⁹ = 47791259 is a prime.

It is not a weakly prime, because it can be changed into another prime (47791721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23895885 + 23895886.

It is an arithmetic number, because the mean of its divisors is an integer number (23895886).

Almost surely, 2^47791771 is an apocalyptic number.

47791771 is a deficient number, since it is larger than the sum of its proper divisors (1).

47791771 is an equidigital number, since it uses as much as digits as its factorization.

47791771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86436, while the sum is 43.

The square root of 47791771 is about 6913.1592633180. The cubic root of 47791771 is about 362.8978329095.

The spelling of 47791771 in words is "forty-seven million, seven hundred ninety-one thousand, seven hundred seventy-one".