85649897 has 2 divisors, whose sum is σ = 85649898. Its totient is φ = 85649896.

The previous prime is 85649873. The next prime is 85649947. The reversal of 85649897 is 79894658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78659161 + 6990736 = 8869^2 + 2644^2 .

It is a cyclic number.

It is not a de Polignac number, because 85649897 - 2⁶ = 85649833 is a prime.

It is a super-2 number, since 2×85649897² = 14671809712221218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85649867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42824948 + 42824949.

It is an arithmetic number, because the mean of its divisors is an integer number (42824949).

Almost surely, 2^85649897 is an apocalyptic number.

It is an amenable number.

85649897 is a deficient number, since it is larger than the sum of its proper divisors (1).

85649897 is an equidigital number, since it uses as much as digits as its factorization.

85649897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The square root of 85649897 is about 9254.7229564153. The cubic root of 85649897 is about 440.8007062575.

The spelling of 85649897 in words is "eighty-five million, six hundred forty-nine thousand, eight hundred ninety-seven".