47678489 has 4 divisors (see below), whose sum is σ = 50483124. Its totient is φ = 44873856.

The previous prime is 47678479. The next prime is 47678503. The reversal of 47678489 is 98487674.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41822089 + 5856400 = 6467^2 + 2420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47678489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47678489.

It is not an unprimeable number, because it can be changed into a prime (47678479) 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, 1402292 + ... + 1402325.

It is an arithmetic number, because the mean of its divisors is an integer number (12620781).

Almost surely, 2^47678489 is an apocalyptic number.

It is an amenable number.

47678489 is a deficient number, since it is larger than the sum of its proper divisors (2804635).

47678489 is a wasteful number, since it uses less digits than its factorization.

47678489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804634.

The product of its digits is 2709504, while the sum is 53.

The square root of 47678489 is about 6904.9611874362. The cubic root of 47678489 is about 362.6108775372.

The spelling of 47678489 in words is "forty-seven million, six hundred seventy-eight thousand, four hundred eighty-nine".