47889791 has 4 divisors (see below), whose sum is σ = 48604632. Its totient is φ = 47174952.

The previous prime is 47889781. The next prime is 47889811. The reversal of 47889791 is 19798874.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47889791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47889781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357320 + ... + 357453.

It is an arithmetic number, because the mean of its divisors is an integer number (12151158).

Almost surely, 2^47889791 is an apocalyptic number.

47889791 is a deficient number, since it is larger than the sum of its proper divisors (714841).

47889791 is an equidigital number, since it uses as much as digits as its factorization.

47889791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714840.

The product of its digits is 1016064, while the sum is 53.

The square root of 47889791 is about 6920.2450101134. The cubic root of 47889791 is about 363.1457623045.

The spelling of 47889791 in words is "forty-seven million, eight hundred eighty-nine thousand, seven hundred ninety-one".