86939144 has 8 divisors (see below), whose sum is σ = 163010910. Its totient is φ = 43469568.

The previous prime is 86939141. The next prime is 86939161. The reversal of 86939144 is 44193968.

It can be written as a sum of positive squares in only one way, i.e., 82264900 + 4674244 = 9070^2 + 2162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 86939095 and 86939104.

It is not an unprimeable number, because it can be changed into a prime (86939141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5433689 + ... + 5433704.

Almost surely, 2^86939144 is an apocalyptic number.

It is an amenable number.

86939144 is a deficient number, since it is larger than the sum of its proper divisors (76071766).

86939144 is a wasteful number, since it uses less digits than its factorization.

86939144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10867399 (or 10867395 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 86939144 is about 9324.1162583915. The cubic root of 86939144 is about 443.0014216587.

The spelling of 86939144 in words is "eighty-six million, nine hundred thirty-nine thousand, one hundred forty-four".