86399212169 has 4 divisors (see below), whose sum is σ = 86445640260. Its totient is φ = 86352784080.

The previous prime is 86399212057. The next prime is 86399212171. The reversal of 86399212169 is 96121299368.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 761042569 + 85638169600 = 27587^2 + 292640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86399212169 is a prime.

It is a super-2 number, since 2×86399212169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86399212189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23211254 + ... + 23214975.

It is an arithmetic number, because the mean of its divisors is an integer number (21611410065).

Almost surely, 2^86399212169 is an apocalyptic number.

It is an amenable number.

86399212169 is a deficient number, since it is larger than the sum of its proper divisors (46428091).

86399212169 is a wasteful number, since it uses less digits than its factorization.

86399212169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46428090.

The product of its digits is 2519424, while the sum is 56.

The spelling of 86399212169 in words is "eighty-six billion, three hundred ninety-nine million, two hundred twelve thousand, one hundred sixty-nine".