47499509 has 4 divisors (see below), whose sum is σ = 47738400. Its totient is φ = 47260620.

The previous prime is 47499503. The next prime is 47499521. The reversal of 47499509 is 90599474.

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.

It is a cyclic number.

It is not a de Polignac number, because 47499509 - 2⁸ = 47499253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47499503) 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, 119147 + ... + 119544.

It is an arithmetic number, because the mean of its divisors is an integer number (11934600).

Almost surely, 2^47499509 is an apocalyptic number.

It is an amenable number.

47499509 is a deficient number, since it is larger than the sum of its proper divisors (238891).

47499509 is a wasteful number, since it uses less digits than its factorization.

47499509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238890.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 47499509 is about 6891.9887550692. The cubic root of 47499509 is about 362.1565743117.

The spelling of 47499509 in words is "forty-seven million, four hundred ninety-nine thousand, five hundred nine".