47489194891 has 4 divisors (see below), whose sum is σ = 47730256992. Its totient is φ = 47248132792.

The previous prime is 47489194877. The next prime is 47489194933. The reversal of 47489194891 is 19849198474.

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 47489194891 - 2⁵ = 47489194859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47489194801) 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, 120530755 + ... + 120531148.

It is an arithmetic number, because the mean of its divisors is an integer number (11932564248).

Almost surely, 2^47489194891 is an apocalyptic number.

47489194891 is a deficient number, since it is larger than the sum of its proper divisors (241062101).

47489194891 is a wasteful number, since it uses less digits than its factorization.

47489194891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241062100.

The product of its digits is 20901888, while the sum is 64.

The spelling of 47489194891 in words is "forty-seven billion, four hundred eighty-nine million, one hundred ninety-four thousand, eight hundred ninety-one".