47920581 has 6 divisors (see below), whose sum is σ = 69218630. Its totient is φ = 31947048.

The previous prime is 47920553. The next prime is 47920583. The reversal of 47920581 is 18502974.

47920581 is a `hidden beast` number, since 4 + 79 + 2 + 0 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24591681 + 23328900 = 4959^2 + 4830^2 .

It is not a de Polignac number, because 47920581 - 2¹⁵ = 47887813 is a prime.

It is a super-2 number, since 2×47920581² = 4592764166755122, 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 (47920583) 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, 2662246 + ... + 2662263.

Almost surely, 2^47920581 is an apocalyptic number.

It is an amenable number.

47920581 is a deficient number, since it is larger than the sum of its proper divisors (21298049).

47920581 is a wasteful number, since it uses less digits than its factorization.

47920581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324515 (or 5324512 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 47920581 is about 6922.4692848723. The cubic root of 47920581 is about 363.2235719474.

The spelling of 47920581 in words is "forty-seven million, nine hundred twenty thousand, five hundred eighty-one".