47809247 has 4 divisors (see below), whose sum is σ = 47880960. Its totient is φ = 47737536.

The previous prime is 47809243. The next prime is 47809271. The reversal of 47809247 is 74290874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47809247 - 2² = 47809243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47809243) 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, 34847 + ... + 36192.

It is an arithmetic number, because the mean of its divisors is an integer number (11970240).

Almost surely, 2^47809247 is an apocalyptic number.

47809247 is a deficient number, since it is larger than the sum of its proper divisors (71713).

47809247 is an equidigital number, since it uses as much as digits as its factorization.

47809247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71712.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 47809247 is about 6914.4231140421. The cubic root of 47809247 is about 362.9420610931.

The spelling of 47809247 in words is "forty-seven million, eight hundred nine thousand, two hundred forty-seven".