85190971 has 2 divisors, whose sum is σ = 85190972. Its totient is φ = 85190970.

The previous prime is 85190923. The next prime is 85190999. The reversal of 85190971 is 17909158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85190971 - 2¹¹ = 85188923 is a prime.

It is not a weakly prime, because it can be changed into another prime (85190921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42595485 + 42595486.

It is an arithmetic number, because the mean of its divisors is an integer number (42595486).

Almost surely, 2^85190971 is an apocalyptic number.

85190971 is a deficient number, since it is larger than the sum of its proper divisors (1).

85190971 is an equidigital number, since it uses as much as digits as its factorization.

85190971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 85190971 is about 9229.8955032005. The cubic root of 85190971 is about 440.0120020831.

The spelling of 85190971 in words is "eighty-five million, one hundred ninety thousand, nine hundred seventy-one".