86642361 has 12 divisors (see below), whose sum is σ = 134777188. Its totient is φ = 53318304.

The previous prime is 86642341. The next prime is 86642371. The reversal of 86642361 is 16324668.

86642361 is a `hidden beast` number, since 8 + 6 + 642 + 3 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52490025 + 34152336 = 7245^2 + 5844^2 .

It is not a de Polignac number, because 86642361 - 2²² = 82448057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86642341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370150 + ... + 370383.

Almost surely, 2^86642361 is an apocalyptic number.

It is an amenable number.

86642361 is a deficient number, since it is larger than the sum of its proper divisors (48134827).

86642361 is a wasteful number, since it uses less digits than its factorization.

86642361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740552 (or 740549 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 86642361 is about 9308.1878472665. The cubic root of 86642361 is about 442.4967576129.

It can be divided in two parts, 8664 and 2361, that added together give a square (11025 = 105²).

The spelling of 86642361 in words is "eighty-six million, six hundred forty-two thousand, three hundred sixty-one".