47638771 has 4 divisors (see below), whose sum is σ = 48110544. Its totient is φ = 47167000.

The previous prime is 47638753. The next prime is 47638807. The reversal of 47638771 is 17783674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17783674 = 2 ⋅8891837.

It is not a de Polignac number, because 47638771 - 2⁹ = 47638259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47638741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235735 + ... + 235936.

It is an arithmetic number, because the mean of its divisors is an integer number (12027636).

Almost surely, 2^47638771 is an apocalyptic number.

47638771 is a deficient number, since it is larger than the sum of its proper divisors (471773).

47638771 is a wasteful number, since it uses less digits than its factorization.

47638771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471772.

The product of its digits is 197568, while the sum is 43.

The square root of 47638771 is about 6902.0845401951. The cubic root of 47638771 is about 362.5101600006.

The spelling of 47638771 in words is "forty-seven million, six hundred thirty-eight thousand, seven hundred seventy-one".