47281613 has 2 divisors, whose sum is σ = 47281614. Its totient is φ = 47281612.

The previous prime is 47281567. The next prime is 47281621. The reversal of 47281613 is 31618274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42863209 + 4418404 = 6547^2 + 2102^2 .

It is a cyclic number.

It is not a de Polignac number, because 47281613 - 2⁸ = 47281357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47281613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47281643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23640806 + 23640807.

It is an arithmetic number, because the mean of its divisors is an integer number (23640807).

Almost surely, 2^47281613 is an apocalyptic number.

It is an amenable number.

47281613 is a deficient number, since it is larger than the sum of its proper divisors (1).

47281613 is an equidigital number, since it uses as much as digits as its factorization.

47281613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 47281613 is about 6876.1626653243. The cubic root of 47281613 is about 361.6019479241.

Adding to 47281613 its reverse (31618274), we get a palindrome (78899887).

The spelling of 47281613 in words is "forty-seven million, two hundred eighty-one thousand, six hundred thirteen".