85151897 has 2 divisors, whose sum is σ = 85151898. Its totient is φ = 85151896.

The previous prime is 85151893. The next prime is 85151909. The reversal of 85151897 is 79815158.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44943616 + 40208281 = 6704^2 + 6341^2 .

It is a cyclic number.

It is not a de Polignac number, because 85151897 - 2² = 85151893 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85151893) 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, 42575948 + 42575949.

It is an arithmetic number, because the mean of its divisors is an integer number (42575949).

Almost surely, 2^85151897 is an apocalyptic number.

It is an amenable number.

85151897 is a deficient number, since it is larger than the sum of its proper divisors (1).

85151897 is an equidigital number, since it uses as much as digits as its factorization.

85151897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 44.

The square root of 85151897 is about 9227.7785517426. The cubic root of 85151897 is about 439.9447192946.

The spelling of 85151897 in words is "eighty-five million, one hundred fifty-one thousand, eight hundred ninety-seven".