47844981 has 6 divisors (see below), whose sum is σ = 69109430. Its totient is φ = 31896648.

The previous prime is 47844971. The next prime is 47844989. The reversal of 47844981 is 18944874.

It can be written as a sum of positive squares in only one way, i.e., 45684081 + 2160900 = 6759^2 + 1470^2 .

It is not a de Polignac number, because 47844981 - 2⁹ = 47844469 is a prime.

It is a super-2 number, since 2×47844981² = 4578284413780722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47844989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2658046 + ... + 2658063.

Almost surely, 2^47844981 is an apocalyptic number.

It is an amenable number.

47844981 is a deficient number, since it is larger than the sum of its proper divisors (21264449).

47844981 is a wasteful number, since it uses less digits than its factorization.

47844981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316115 (or 5316112 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 47844981 is about 6917.0066502787. The cubic root of 47844981 is about 363.0324630030.

The spelling of 47844981 in words is "forty-seven million, eight hundred forty-four thousand, nine hundred eighty-one".