47881787 has 4 divisors (see below), whose sum is σ = 48458760. Its totient is φ = 47304816.

The previous prime is 47881783. The next prime is 47881807. The reversal of 47881787 is 78718874.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 47881787 - 2² = 47881783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47881781) 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, 288362 + ... + 288527.

It is an arithmetic number, because the mean of its divisors is an integer number (12114690).

Almost surely, 2^47881787 is an apocalyptic number.

47881787 is a deficient number, since it is larger than the sum of its proper divisors (576973).

47881787 is an equidigital number, since it uses as much as digits as its factorization.

47881787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576972.

The product of its digits is 702464, while the sum is 50.

The square root of 47881787 is about 6919.6666827240. Note that the first 4 decimals coincide. The cubic root of 47881787 is about 363.1255298738.

The spelling of 47881787 in words is "forty-seven million, eight hundred eighty-one thousand, seven hundred eighty-seven".