86655442 has 4 divisors (see below), whose sum is σ = 129983166. Its totient is φ = 43327720.

The previous prime is 86655433. The next prime is 86655463. The reversal of 86655442 is 24455668.

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

It can be written as a sum of positive squares in only one way, i.e., 86471401 + 184041 = 9299^2 + 429^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 86655395 and 86655404.

It is an unprimeable number.

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

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21663859 + ... + 21663862.

Almost surely, 2^86655442 is an apocalyptic number.

86655442 is a deficient number, since it is larger than the sum of its proper divisors (43327724).

86655442 is a wasteful number, since it uses less digits than its factorization.

86655442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43327723.

The product of its digits is 230400, while the sum is 40.

The square root of 86655442 is about 9308.8904816847. The cubic root of 86655442 is about 442.5190254303.

The spelling of 86655442 in words is "eighty-six million, six hundred fifty-five thousand, four hundred forty-two".