47279213 has 2 divisors, whose sum is σ = 47279214. Its totient is φ = 47279212.

The previous prime is 47279161. The next prime is 47279249. The reversal of 47279213 is 31297274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 1283689 = 6782^2 + 1133^2 .

It is a cyclic number.

It is not a de Polignac number, because 47279213 - 2⁶ = 47279149 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_2847473 and since 47279213 and 2847473 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47279263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23639606 + 23639607.

It is an arithmetic number, because the mean of its divisors is an integer number (23639607).

Almost surely, 2^47279213 is an apocalyptic number.

It is an amenable number.

47279213 is a deficient number, since it is larger than the sum of its proper divisors (1).

47279213 is an equidigital number, since it uses as much as digits as its factorization.

47279213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 47279213 is about 6875.9881471684. The cubic root of 47279213 is about 361.5958295531.

The spelling of 47279213 in words is "forty-seven million, two hundred seventy-nine thousand, two hundred thirteen".