47116813 has 2 divisors, whose sum is σ = 47116814. Its totient is φ = 47116812.

The previous prime is 47116781. The next prime is 47116837. The reversal of 47116813 is 31861174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43204329 + 3912484 = 6573^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 47116813 - 2⁵ = 47116781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47116613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23558406 + 23558407.

It is an arithmetic number, because the mean of its divisors is an integer number (23558407).

Almost surely, 2^47116813 is an apocalyptic number.

It is an amenable number.

47116813 is a deficient number, since it is larger than the sum of its proper divisors (1).

47116813 is an equidigital number, since it uses as much as digits as its factorization.

47116813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 47116813 is about 6864.1687770625. The cubic root of 47116813 is about 361.1813378281.

Adding to 47116813 its reverse (31861174), we get a palindrome (78977987).

The spelling of 47116813 in words is "forty-seven million, one hundred sixteen thousand, eight hundred thirteen".