47447613 has 20 divisors (see below), whose sum is σ = 71066688. Its totient is φ = 31547880.

The previous prime is 47447599. The next prime is 47447627. The reversal of 47447613 is 31674474.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (47447599) and next prime (47447627).

It is not a de Polignac number, because 47447613 - 2⁶ = 47447549 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47442613) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51628 + ... + 52538.

Almost surely, 2^47447613 is an apocalyptic number.

It is an amenable number.

47447613 is a deficient number, since it is larger than the sum of its proper divisors (23619075).

47447613 is an equidigital number, since it uses as much as digits as its factorization.

47447613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1557 counting only the distinct ones).

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

The square root of 47447613 is about 6888.2227751431. Note that the first 3 decimals coincide. The cubic root of 47447613 is about 362.0246338150.

The spelling of 47447613 in words is "forty-seven million, four hundred forty-seven thousand, six hundred thirteen".