86615423197 has 2 divisors, whose sum is σ = 86615423198. Its totient is φ = 86615423196.

The previous prime is 86615423189. The next prime is 86615423261. The reversal of 86615423197 is 79132451668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72419653881 + 14195769316 = 269109^2 + 119146^2 .

It is a cyclic number.

It is not a de Polignac number, because 86615423197 - 2³ = 86615423189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86615420197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43307711598 + 43307711599.

It is an arithmetic number, because the mean of its divisors is an integer number (43307711599).

Almost surely, 2^86615423197 is an apocalyptic number.

It is an amenable number.

86615423197 is a deficient number, since it is larger than the sum of its proper divisors (1).

86615423197 is an equidigital number, since it uses as much as digits as its factorization.

86615423197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 52.

The spelling of 86615423197 in words is "eighty-six billion, six hundred fifteen million, four hundred twenty-three thousand, one hundred ninety-seven".