47681009 has 4 divisors (see below), whose sum is σ = 47697216. Its totient is φ = 47664804.

The previous prime is 47680993. The next prime is 47681021. The reversal of 47681009 is 90018674.

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 47681009 - 2⁴ = 47680993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47681009.

It is not an unprimeable number, because it can be changed into a prime (47681059) 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, 2309 + ... + 10034.

It is an arithmetic number, because the mean of its divisors is an integer number (11924304).

Almost surely, 2^47681009 is an apocalyptic number.

It is an amenable number.

47681009 is a deficient number, since it is larger than the sum of its proper divisors (16207).

47681009 is a wasteful number, since it uses less digits than its factorization.

47681009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16206.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 47681009 is about 6905.1436625171. The cubic root of 47681009 is about 362.6172659059.

The spelling of 47681009 in words is "forty-seven million, six hundred eighty-one thousand, nine".