47869809 has 8 divisors (see below), whose sum is σ = 68736192. Its totient is φ = 29458320.

The previous prime is 47869799. The next prime is 47869883. The reversal of 47869809 is 90896874.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47869809 - 2⁷ = 47869681 is a prime.

It is a super-2 number, since 2×47869809² = 4583037227392962, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47869609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613677 + ... + 613754.

It is an arithmetic number, because the mean of its divisors is an integer number (8592024).

Almost surely, 2^47869809 is an apocalyptic number.

It is an amenable number.

47869809 is a deficient number, since it is larger than the sum of its proper divisors (20866383).

47869809 is a wasteful number, since it uses less digits than its factorization.

47869809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227447.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 47869809 is about 6918.8011244724. The cubic root of 47869809 is about 363.0952477937.

The spelling of 47869809 in words is "forty-seven million, eight hundred sixty-nine thousand, eight hundred nine".