47709481 has 4 divisors (see below), whose sum is σ = 48155472. Its totient is φ = 47263492.

The previous prime is 47709469. The next prime is 47709491. The reversal of 47709481 is 18490774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47709481 - 2⁵ = 47709449 is a prime.

It is a super-2 number, since 2×47709481² = 4552389154578722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47709401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222835 + ... + 223048.

It is an arithmetic number, because the mean of its divisors is an integer number (12038868).

Almost surely, 2^47709481 is an apocalyptic number.

47709481 is the 4369-th centered pentagonal number.

It is an amenable number.

47709481 is a deficient number, since it is larger than the sum of its proper divisors (445991).

47709481 is a wasteful number, since it uses less digits than its factorization.

47709481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445990.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 47709481 is about 6907.2050063684. The cubic root of 47709481 is about 362.6894286996.

The spelling of 47709481 in words is "forty-seven million, seven hundred nine thousand, four hundred eighty-one".