47432009 has 2 divisors, whose sum is σ = 47432010. Its totient is φ = 47432008.

The previous prime is 47431997. The next prime is 47432029. The reversal of 47432009 is 90023474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39337984 + 8094025 = 6272^2 + 2845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47432009 is a prime.

It is not a weakly prime, because it can be changed into another prime (47432029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23716004 + 23716005.

It is an arithmetic number, because the mean of its divisors is an integer number (23716005).

Almost surely, 2^47432009 is an apocalyptic number.

It is an amenable number.

47432009 is a deficient number, since it is larger than the sum of its proper divisors (1).

47432009 is an equidigital number, since it uses as much as digits as its factorization.

47432009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 47432009 is about 6887.0900240958. The cubic root of 47432009 is about 361.9849433620.

The spelling of 47432009 in words is "forty-seven million, four hundred thirty-two thousand, nine".