47980809 has 8 divisors (see below), whose sum is σ = 71082720. Its totient is φ = 31987188.

The previous prime is 47980789. The next prime is 47980811. The reversal of 47980809 is 90808974.

It is not a de Polignac number, because 47980809 - 2¹¹ = 47978761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47984809) 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, 888507 + ... + 888560.

It is an arithmetic number, because the mean of its divisors is an integer number (8885340).

Almost surely, 2^47980809 is an apocalyptic number.

It is an amenable number.

47980809 is a deficient number, since it is larger than the sum of its proper divisors (23101911).

47980809 is a wasteful number, since it uses less digits than its factorization.

47980809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777076 (or 1777070 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 47980809 is about 6926.8181006866. The cubic root of 47980809 is about 363.3756782750.

The spelling of 47980809 in words is "forty-seven million, nine hundred eighty thousand, eight hundred nine".