47477081 has 4 divisors (see below), whose sum is σ = 47519412. Its totient is φ = 47434752.

The previous prime is 47477069. The next prime is 47477099. The reversal of 47477081 is 18077474.

47477081 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 can be written as a sum of positive squares in 2 ways, for example, as 25000000 + 22477081 = 5000^2 + 4741^2 .

It is a cyclic number.

It is not a de Polignac number, because 47477081 - 2¹⁰ = 47476057 is a prime.

It is a super-2 number, since 2×47477081² = 4508146440561122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47477041) 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, 19436 + ... + 21741.

It is an arithmetic number, because the mean of its divisors is an integer number (11879853).

Almost surely, 2^47477081 is an apocalyptic number.

It is an amenable number.

47477081 is a deficient number, since it is larger than the sum of its proper divisors (42331).

47477081 is a wasteful number, since it uses less digits than its factorization.

47477081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42330.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 47477081 is about 6890.3614564114. The cubic root of 47477081 is about 362.0995651162.

The spelling of 47477081 in words is "forty-seven million, four hundred seventy-seven thousand, eighty-one".