47431647 has 6 divisors (see below), whose sum is σ = 68512392. Its totient is φ = 31621092.

The previous prime is 47431627. The next prime is 47431673. The reversal of 47431647 is 74613474.

It is a happy number.

47431647 is a `hidden beast` number, since 4 + 7 + 4 + 3 + 1 + 647 = 666.

It is not a de Polignac number, because 47431647 - 2²⁴ = 30654431 is a prime.

It is a super-2 number, since 2×47431647² = 4499522274265218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47431607) 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, 2635083 + ... + 2635100.

It is an arithmetic number, because the mean of its divisors is an integer number (11418732).

Almost surely, 2^47431647 is an apocalyptic number.

47431647 is a deficient number, since it is larger than the sum of its proper divisors (21080745).

47431647 is a wasteful number, since it uses less digits than its factorization.

47431647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270189 (or 5270186 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 47431647 is about 6887.0637429895. The cubic root of 47431647 is about 361.9840224728.

The spelling of 47431647 in words is "forty-seven million, four hundred thirty-one thousand, six hundred forty-seven".