85662001 has 2 divisors, whose sum is σ = 85662002. Its totient is φ = 85662000.

The previous prime is 85661999. The next prime is 85662011. The reversal of 85662001 is 10026658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84621601 + 1040400 = 9199^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 85662001 - 2¹ = 85661999 is a prime.

Together with 85661999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85662011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42831000 + 42831001.

It is an arithmetic number, because the mean of its divisors is an integer number (42831001).

Almost surely, 2^85662001 is an apocalyptic number.

It is an amenable number.

85662001 is a deficient number, since it is larger than the sum of its proper divisors (1).

85662001 is an equidigital number, since it uses as much as digits as its factorization.

85662001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 85662001 is about 9255.3768696904. The cubic root of 85662001 is about 440.8214698569.

Adding to 85662001 its reverse (10026658), we get a palindrome (95688659).

The spelling of 85662001 in words is "eighty-five million, six hundred sixty-two thousand, one".