47028521 has 2 divisors, whose sum is σ = 47028522. Its totient is φ = 47028520.

The previous prime is 47028473. The next prime is 47028523. The reversal of 47028521 is 12582074.

47028521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40500496 + 6528025 = 6364^2 + 2555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47028521 is a prime.

It is a Sophie Germain prime.

Together with 47028523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (47028523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23514260 + 23514261.

It is an arithmetic number, because the mean of its divisors is an integer number (23514261).

Almost surely, 2^47028521 is an apocalyptic number.

It is an amenable number.

47028521 is a deficient number, since it is larger than the sum of its proper divisors (1).

47028521 is an equidigital number, since it uses as much as digits as its factorization.

47028521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 47028521 is about 6857.7343926402. The cubic root of 47028521 is about 360.9555913584.

The spelling of 47028521 in words is "forty-seven million, twenty-eight thousand, five hundred twenty-one".