85869511097 has 2 divisors, whose sum is σ = 85869511098. Its totient is φ = 85869511096.

The previous prime is 85869510989. The next prime is 85869511111. The reversal of 85869511097 is 79011596858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85863064576 + 6446521 = 293024^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 85869511097 - 2²² = 85865316793 is a prime.

It is a super-2 number, since 2×85869511097² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85869511697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42934755548 + 42934755549.

It is an arithmetic number, because the mean of its divisors is an integer number (42934755549).

Almost surely, 2^85869511097 is an apocalyptic number.

It is an amenable number.

85869511097 is a deficient number, since it is larger than the sum of its proper divisors (1).

85869511097 is an equidigital number, since it uses as much as digits as its factorization.

85869511097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 59.

The spelling of 85869511097 in words is "eighty-five billion, eight hundred sixty-nine million, five hundred eleven thousand, ninety-seven".