47047321 has 2 divisors, whose sum is σ = 47047322. Its totient is φ = 47047320.

The previous prime is 47047291. The next prime is 47047327. The reversal of 47047321 is 12374074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40182921 + 6864400 = 6339^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 47047321 - 2²⁵ = 13492889 is a prime.

It is a super-3 number, since 3×47047321³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47047321.

It is not a weakly prime, because it can be changed into another prime (47047327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23523660 + 23523661.

It is an arithmetic number, because the mean of its divisors is an integer number (23523661).

Almost surely, 2^47047321 is an apocalyptic number.

It is an amenable number.

47047321 is a deficient number, since it is larger than the sum of its proper divisors (1).

47047321 is an equidigital number, since it uses as much as digits as its factorization.

47047321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 47047321 is about 6859.1049707670. The cubic root of 47047321 is about 361.0036831754.

The spelling of 47047321 in words is "forty-seven million, forty-seven thousand, three hundred twenty-one".