47809823 has 2 divisors, whose sum is σ = 47809824. Its totient is φ = 47809822.

The previous prime is 47809789. The next prime is 47809837. The reversal of 47809823 is 32890874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47809823 - 2²⁴ = 31032607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47809873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23904911 + 23904912.

It is an arithmetic number, because the mean of its divisors is an integer number (23904912).

Almost surely, 2^47809823 is an apocalyptic number.

47809823 is a deficient number, since it is larger than the sum of its proper divisors (1).

47809823 is an equidigital number, since it uses as much as digits as its factorization.

47809823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 47809823 is about 6914.4647659815. The cubic root of 47809823 is about 362.9435186478.

The spelling of 47809823 in words is "forty-seven million, eight hundred nine thousand, eight hundred twenty-three".