47705891 has 2 divisors, whose sum is σ = 47705892. Its totient is φ = 47705890.

The previous prime is 47705881. The next prime is 47705909. The reversal of 47705891 is 19850774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47705891 - 2¹⁴ = 47689507 is a prime.

It is a super-2 number, since 2×47705891² = 4551704072207762, which contains 22 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23852945 + 23852946.

It is an arithmetic number, because the mean of its divisors is an integer number (23852946).

Almost surely, 2^47705891 is an apocalyptic number.

47705891 is a deficient number, since it is larger than the sum of its proper divisors (1).

47705891 is an equidigital number, since it uses as much as digits as its factorization.

47705891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 47705891 is about 6906.9451279129. The cubic root of 47705891 is about 362.6803313624.

The spelling of 47705891 in words is "forty-seven million, seven hundred five thousand, eight hundred ninety-one".