47289521 has 4 divisors (see below), whose sum is σ = 47304192. Its totient is φ = 47274852.

The previous prime is 47289511. The next prime is 47289553. The reversal of 47289521 is 12598274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 47289521 - 2¹⁰ = 47288497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47289511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161 + ... + 9726.

It is an arithmetic number, because the mean of its divisors is an integer number (11826048).

Almost surely, 2^47289521 is an apocalyptic number.

It is an amenable number.

47289521 is a deficient number, since it is larger than the sum of its proper divisors (14671).

47289521 is an equidigital number, since it uses as much as digits as its factorization.

47289521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14670.

The product of its digits is 40320, while the sum is 38.

The square root of 47289521 is about 6876.7376713090. The cubic root of 47289521 is about 361.6221064919.

The spelling of 47289521 in words is "forty-seven million, two hundred eighty-nine thousand, five hundred twenty-one".