86944243969 has 4 divisors (see below), whose sum is σ = 94848266160. Its totient is φ = 79040221780.

The previous prime is 86944243963. The next prime is 86944243973. The reversal of 86944243969 is 96934244968.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86944243969 - 2¹⁷ = 86944112897 is a prime.

It is a super-2 number, since 2×86944243969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86944243969.

It is not an unprimeable number, because it can be changed into a prime (86944243963) 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, 3952011079 + ... + 3952011100.

It is an arithmetic number, because the mean of its divisors is an integer number (23712066540).

Almost surely, 2^86944243969 is an apocalyptic number.

It is an amenable number.

86944243969 is a deficient number, since it is larger than the sum of its proper divisors (7904022191).

86944243969 is a wasteful number, since it uses less digits than its factorization.

86944243969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7904022190.

The product of its digits is 80621568, while the sum is 64.

Subtracting 86944243969 from its reverse (96934244968), we obtain a palindrome (9990000999).

The spelling of 86944243969 in words is "eighty-six billion, nine hundred forty-four million, two hundred forty-three thousand, nine hundred sixty-nine".