47987899 has 4 divisors (see below), whose sum is σ = 48051720. Its totient is φ = 47924080.

The previous prime is 47987897. The next prime is 47987903. The reversal of 47987899 is 99878974.

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 47987899 - 2¹ = 47987897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47987897) 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, 30769 + ... + 32290.

It is an arithmetic number, because the mean of its divisors is an integer number (12012930).

Almost surely, 2^47987899 is an apocalyptic number.

47987899 is a deficient number, since it is larger than the sum of its proper divisors (63821).

47987899 is an equidigital number, since it uses as much as digits as its factorization.

47987899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63820.

The product of its digits is 9144576, while the sum is 61.

The square root of 47987899 is about 6927.3298607761. The cubic root of 47987899 is about 363.3935757548.

The spelling of 47987899 in words is "forty-seven million, nine hundred eighty-seven thousand, eight hundred ninety-nine".