47812791 has 32 divisors (see below), whose sum is σ = 72317952. Its totient is φ = 27878400.

The previous prime is 47812747. The next prime is 47812841. The reversal of 47812791 is 19721874.

It is not a de Polignac number, because 47812791 - 2⁶ = 47812727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47812091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135271 + ... + 135623.

It is an arithmetic number, because the mean of its divisors is an integer number (2259936).

Almost surely, 2^47812791 is an apocalyptic number.

47812791 is a deficient number, since it is larger than the sum of its proper divisors (24505161).

47812791 is a wasteful number, since it uses less digits than its factorization.

47812791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543.

The product of its digits is 28224, while the sum is 39.

The square root of 47812791 is about 6914.6793851921. The cubic root of 47812791 is about 362.9510289181.

The spelling of 47812791 in words is "forty-seven million, eight hundred twelve thousand, seven hundred ninety-one".