87849571 has 2 divisors, whose sum is σ = 87849572. Its totient is φ = 87849570.

The previous prime is 87849569. The next prime is 87849611. The reversal of 87849571 is 17594878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87849571 - 2¹ = 87849569 is a prime.

Together with 87849569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87849271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43924785 + 43924786.

It is an arithmetic number, because the mean of its divisors is an integer number (43924786).

Almost surely, 2^87849571 is an apocalyptic number.

87849571 is a deficient number, since it is larger than the sum of its proper divisors (1).

87849571 is an equidigital number, since it uses as much as digits as its factorization.

87849571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 87849571 is about 9372.8101975875. The cubic root of 87849571 is about 444.5424257564.

The spelling of 87849571 in words is "eighty-seven million, eight hundred forty-nine thousand, five hundred seventy-one".