85202690897 has 2 divisors, whose sum is σ = 85202690898. Its totient is φ = 85202690896.

The previous prime is 85202690891. The next prime is 85202690957. The reversal of 85202690897 is 79809620258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66627999376 + 18574691521 = 258124^2 + 136289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85202690897 is a prime.

It is not a weakly prime, because it can be changed into another prime (85202690891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42601345448 + 42601345449.

It is an arithmetic number, because the mean of its divisors is an integer number (42601345449).

Almost surely, 2^85202690897 is an apocalyptic number.

It is an amenable number.

85202690897 is a deficient number, since it is larger than the sum of its proper divisors (1).

85202690897 is an equidigital number, since it uses as much as digits as its factorization.

85202690897 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 85202690897 in words is "eighty-five billion, two hundred two million, six hundred ninety thousand, eight hundred ninety-seven".