86681236 has 6 divisors (see below), whose sum is σ = 151692170. Its totient is φ = 43340616.

The previous prime is 86681213. The next prime is 86681251. The reversal of 86681236 is 63218668.

It can be written as a sum of positive squares in only one way, i.e., 57456400 + 29224836 = 7580^2 + 5406^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10835151 + ... + 10835158.

Almost surely, 2^86681236 is an apocalyptic number.

It is an amenable number.

86681236 is a deficient number, since it is larger than the sum of its proper divisors (65010934).

86681236 is a wasteful number, since it uses less digits than its factorization.

86681236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21670313 (or 21670311 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 86681236 is about 9310.2758283522. The cubic root of 86681236 is about 442.5629280525.

The spelling of 86681236 in words is "eighty-six million, six hundred eighty-one thousand, two hundred thirty-six".