86639055 has 16 divisors (see below), whose sum is σ = 146777184. Its totient is φ = 43489280.

The previous prime is 86639053. The next prime is 86639057. The reversal of 86639055 is 55093668.

It is an interprime number because it is at equal distance from previous prime (86639053) and next prime (86639057).

It is not a de Polignac number, because 86639055 - 2¹ = 86639053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86638998 and 86639016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86639053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169626 + ... + 170135.

It is an arithmetic number, because the mean of its divisors is an integer number (9173574).

Almost surely, 2^86639055 is an apocalyptic number.

86639055 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

86639055 is a deficient number, since it is larger than the sum of its proper divisors (60138129).

86639055 is a wasteful number, since it uses less digits than its factorization.

86639055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339786.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 86639055 is about 9308.0102599858. The cubic root of 86639055 is about 442.4911294465.

The spelling of 86639055 in words is "eighty-six million, six hundred thirty-nine thousand, fifty-five".