47057809 has 2 divisors, whose sum is σ = 47057810. Its totient is φ = 47057808.

The previous prime is 47057797. The next prime is 47057827. The reversal of 47057809 is 90875074.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46881409 + 176400 = 6847^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 47057809 - 2²³ = 38669201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47057909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23528904 + 23528905.

It is an arithmetic number, because the mean of its divisors is an integer number (23528905).

Almost surely, 2^47057809 is an apocalyptic number.

It is an amenable number.

47057809 is a deficient number, since it is larger than the sum of its proper divisors (1).

47057809 is an equidigital number, since it uses as much as digits as its factorization.

47057809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 47057809 is about 6859.8694593994. The cubic root of 47057809 is about 361.0305067029.

The spelling of 47057809 in words is "forty-seven million, fifty-seven thousand, eight hundred nine".