47790909 has 12 divisors (see below), whose sum is σ = 72664800. Its totient is φ = 30183624.

The previous prime is 47790901. The next prime is 47790913. The reversal of 47790909 is 90909774.

47790909 is a `hidden beast` number, since 477 + 90 + 90 + 9 = 666.

It is not a de Polignac number, because 47790909 - 2³ = 47790901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47790901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139569 + ... + 139910.

It is an arithmetic number, because the mean of its divisors is an integer number (6055400).

Almost surely, 2^47790909 is an apocalyptic number.

It is an amenable number.

47790909 is a deficient number, since it is larger than the sum of its proper divisors (24873891).

47790909 is a wasteful number, since it uses less digits than its factorization.

47790909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279504 (or 279501 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 47790909 is about 6913.0969181692. The cubic root of 47790909 is about 362.8956510847.

The spelling of 47790909 in words is "forty-seven million, seven hundred ninety thousand, nine hundred nine".