86173661797 has 2 divisors, whose sum is σ = 86173661798. Its totient is φ = 86173661796.

The previous prime is 86173661767. The next prime is 86173661803. The reversal of 86173661797 is 79716637168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74886511716 + 11287150081 = 273654^2 + 106241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86173661797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86173661737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43086830898 + 43086830899.

It is an arithmetic number, because the mean of its divisors is an integer number (43086830899).

Almost surely, 2^86173661797 is an apocalyptic number.

It is an amenable number.

86173661797 is a deficient number, since it is larger than the sum of its proper divisors (1).

86173661797 is an equidigital number, since it uses as much as digits as its factorization.

86173661797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 61.

The spelling of 86173661797 in words is "eighty-six billion, one hundred seventy-three million, six hundred sixty-one thousand, seven hundred ninety-seven".