85972759109 has 2 divisors, whose sum is σ = 85972759110. Its totient is φ = 85972759108.

The previous prime is 85972759097. The next prime is 85972759139. The reversal of 85972759109 is 90195727958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82432152100 + 3540607009 = 287110^2 + 59503^2 .

It is a cyclic number.

It is not a de Polignac number, because 85972759109 - 2¹² = 85972755013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85972759139) 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, 42986379554 + 42986379555.

It is an arithmetic number, because the mean of its divisors is an integer number (42986379555).

Almost surely, 2^85972759109 is an apocalyptic number.

It is an amenable number.

85972759109 is a deficient number, since it is larger than the sum of its proper divisors (1).

85972759109 is an equidigital number, since it uses as much as digits as its factorization.

85972759109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14288400, while the sum is 62.

The spelling of 85972759109 in words is "eighty-five billion, nine hundred seventy-two million, seven hundred fifty-nine thousand, one hundred nine".