47631409 has 4 divisors (see below), whose sum is σ = 54435904. Its totient is φ = 40826916.

The previous prime is 47631403. The next prime is 47631443. The reversal of 47631409 is 90413674.

It is a happy number.

47631409 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, 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 47631409 - 2⁵ = 47631377 is a prime.

It is a super-2 number, since 2×47631409² = 4537502246650562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47631403) 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, 3402237 + ... + 3402250.

It is an arithmetic number, because the mean of its divisors is an integer number (13608976).

Almost surely, 2^47631409 is an apocalyptic number.

It is an amenable number.

47631409 is a deficient number, since it is larger than the sum of its proper divisors (6804495).

47631409 is an equidigital number, since it uses as much as digits as its factorization.

47631409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804494.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 47631409 is about 6901.5512024472. The cubic root of 47631409 is about 362.4914851745.

The spelling of 47631409 in words is "forty-seven million, six hundred thirty-one thousand, four hundred nine".