47132509 has 2 divisors, whose sum is σ = 47132510. Its totient is φ = 47132508.

The previous prime is 47132507. The next prime is 47132513. The reversal of 47132509 is 90523174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 1570009 = 6750^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 47132509 - 2¹ = 47132507 is a prime.

Together with 47132507, 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 (47132507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23566254 + 23566255.

It is an arithmetic number, because the mean of its divisors is an integer number (23566255).

Almost surely, 2^47132509 is an apocalyptic number.

It is an amenable number.

47132509 is a deficient number, since it is larger than the sum of its proper divisors (1).

47132509 is an equidigital number, since it uses as much as digits as its factorization.

47132509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 47132509 is about 6865.3120103896. The cubic root of 47132509 is about 361.2214400940.

The spelling of 47132509 in words is "forty-seven million, one hundred thirty-two thousand, five hundred nine".