85197677 has 2 divisors, whose sum is σ = 85197678. Its totient is φ = 85197676.

The previous prime is 85197667. The next prime is 85197689. The reversal of 85197677 is 77679158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79370281 + 5827396 = 8909^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 85197677 - 2¹⁰ = 85196653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85197617) 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, 42598838 + 42598839.

It is an arithmetic number, because the mean of its divisors is an integer number (42598839).

Almost surely, 2^85197677 is an apocalyptic number.

It is an amenable number.

85197677 is a deficient number, since it is larger than the sum of its proper divisors (1).

85197677 is an equidigital number, since it uses as much as digits as its factorization.

85197677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 50.

The square root of 85197677 is about 9230.2587721038. The cubic root of 85197677 is about 440.0235472935.

The spelling of 85197677 in words is "eighty-five million, one hundred ninety-seven thousand, six hundred seventy-seven".