85988971 has 2 divisors, whose sum is σ = 85988972. Its totient is φ = 85988970.

The previous prime is 85988957. The next prime is 85988977. The reversal of 85988971 is 17988958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85988971 - 2⁹ = 85988459 is a prime.

It is not a weakly prime, because it can be changed into another prime (85988977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42994485 + 42994486.

It is an arithmetic number, because the mean of its divisors is an integer number (42994486).

Almost surely, 2^85988971 is an apocalyptic number.

85988971 is a deficient number, since it is larger than the sum of its proper divisors (1).

85988971 is an equidigital number, since it uses as much as digits as its factorization.

85988971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 55.

The square root of 85988971 is about 9273.0238326017. The cubic root of 85988971 is about 441.3816264218.

The spelling of 85988971 in words is "eighty-five million, nine hundred eighty-eight thousand, nine hundred seventy-one".