47444991 has 16 divisors (see below), whose sum is σ = 69168000. Its totient is φ = 28689120.

The previous prime is 47444939. The next prime is 47445019. The reversal of 47444991 is 19944474.

It is not a de Polignac number, because 47444991 - 2⁷ = 47444863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47444191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15885 + ... + 18633.

It is an arithmetic number, because the mean of its divisors is an integer number (4323000).

Almost surely, 2^47444991 is an apocalyptic number.

47444991 is a deficient number, since it is larger than the sum of its proper divisors (21723009).

47444991 is a wasteful number, since it uses less digits than its factorization.

47444991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286.

The product of its digits is 145152, while the sum is 42.

The square root of 47444991 is about 6888.0324476588. The cubic root of 47444991 is about 362.0179650842.

The spelling of 47444991 in words is "forty-seven million, four hundred forty-four thousand, nine hundred ninety-one".