47705851 has 2 divisors, whose sum is σ = 47705852. Its totient is φ = 47705850.

The previous prime is 47705849. The next prime is 47705873. The reversal of 47705851 is 15850774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47705851 - 2¹ = 47705849 is a prime.

Together with 47705849, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 47705851.

It is not a weakly prime, because it can be changed into another prime (47705821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23852925 + 23852926.

It is an arithmetic number, because the mean of its divisors is an integer number (23852926).

Almost surely, 2^47705851 is an apocalyptic number.

47705851 is a deficient number, since it is larger than the sum of its proper divisors (1).

47705851 is an equidigital number, since it uses as much as digits as its factorization.

47705851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 47705851 is about 6906.9422322762. The cubic root of 47705851 is about 362.6802299968.

The spelling of 47705851 in words is "forty-seven million, seven hundred five thousand, eight hundred fifty-one".