47775747 has 8 divisors (see below), whose sum is σ = 67053760. Its totient is φ = 30174120.

The previous prime is 47775697. The next prime is 47775779. The reversal of 47775747 is 74757774.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47775747 - 2¹⁸ = 47513603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47775696 and 47775705.

It is not an unprimeable number, because it can be changed into a prime (47775787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419029 + ... + 419142.

It is an arithmetic number, because the mean of its divisors is an integer number (8381720).

Almost surely, 2^47775747 is an apocalyptic number.

47775747 is a deficient number, since it is larger than the sum of its proper divisors (19278013).

47775747 is a wasteful number, since it uses less digits than its factorization.

47775747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838193.

The product of its digits is 1344560, while the sum is 48.

The square root of 47775747 is about 6912.0002170139. Note that the first 3 decimals coincide. The cubic root of 47775747 is about 362.8572699647.

The spelling of 47775747 in words is "forty-seven million, seven hundred seventy-five thousand, seven hundred forty-seven".