47842491 has 4 divisors (see below), whose sum is σ = 63789992. Its totient is φ = 31894992.

The previous prime is 47842481. The next prime is 47842493. The reversal of 47842491 is 19424874.

47842491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 47842491 - 2¹⁸ = 47580347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47842493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7973746 + ... + 7973751.

It is an arithmetic number, because the mean of its divisors is an integer number (15947498).

Almost surely, 2^47842491 is an apocalyptic number.

47842491 is a deficient number, since it is larger than the sum of its proper divisors (15947501).

47842491 is a wasteful number, since it uses less digits than its factorization.

47842491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947500.

The product of its digits is 64512, while the sum is 39.

The square root of 47842491 is about 6916.8266567842. The cubic root of 47842491 is about 363.0261651183.

The spelling of 47842491 in words is "forty-seven million, eight hundred forty-two thousand, four hundred ninety-one".