47971213 has 2 divisors, whose sum is σ = 47971214. Its totient is φ = 47971212.

The previous prime is 47971211. The next prime is 47971223. The reversal of 47971213 is 31217974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32114889 + 15856324 = 5667^2 + 3982^2 .

It is a cyclic number.

It is not a de Polignac number, because 47971213 - 2¹ = 47971211 is a prime.

Together with 47971211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47971211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23985606 + 23985607.

It is an arithmetic number, because the mean of its divisors is an integer number (23985607).

Almost surely, 2^47971213 is an apocalyptic number.

It is an amenable number.

47971213 is a deficient number, since it is larger than the sum of its proper divisors (1).

47971213 is an equidigital number, since it uses as much as digits as its factorization.

47971213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 47971213 is about 6926.1253959194. The cubic root of 47971213 is about 363.3514520232.

It can be divided in two parts, 47971 and 213, that added together give a palindrome (48184).

The spelling of 47971213 in words is "forty-seven million, nine hundred seventy-one thousand, two hundred thirteen".