85990901 has 2 divisors, whose sum is σ = 85990902. Its totient is φ = 85990900.

The previous prime is 85990897. The next prime is 85990909. The reversal of 85990901 is 10909958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81018001 + 4972900 = 9001^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 85990901 - 2² = 85990897 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85990909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42995450 + 42995451.

It is an arithmetic number, because the mean of its divisors is an integer number (42995451).

Almost surely, 2^85990901 is an apocalyptic number.

It is an amenable number.

85990901 is a deficient number, since it is larger than the sum of its proper divisors (1).

85990901 is an equidigital number, since it uses as much as digits as its factorization.

85990901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 85990901 is about 9273.1278973171. The cubic root of 85990901 is about 441.3849286288.

The spelling of 85990901 in words is "eighty-five million, nine hundred ninety thousand, nine hundred one".