47686509 has 16 divisors (see below), whose sum is σ = 76081600. Its totient is φ = 29345328.

The previous prime is 47686501. The next prime is 47686517. The reversal of 47686509 is 90568674.

It is an interprime number because it is at equal distance from previous prime (47686501) and next prime (47686517).

It is not a de Polignac number, because 47686509 - 2³ = 47686501 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 (47686501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67579 + ... + 68280.

It is an arithmetic number, because the mean of its divisors is an integer number (4755100).

Almost surely, 2^47686509 is an apocalyptic number.

It is an amenable number.

47686509 is a deficient number, since it is larger than the sum of its proper divisors (28395091).

47686509 is a wasteful number, since it uses less digits than its factorization.

47686509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135881 (or 135875 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 47686509 is about 6905.5419048761. The cubic root of 47686509 is about 362.6312079926.

The spelling of 47686509 in words is "forty-seven million, six hundred eighty-six thousand, five hundred nine".