86861601 has 6 divisors (see below), whose sum is σ = 125466770. Its totient is φ = 57907728.

The previous prime is 86861587. The next prime is 86861603. The reversal of 86861601 is 10616868.

It can be written as a sum of positive squares in only one way, i.e., 60606225 + 26255376 = 7785^2 + 5124^2 .

It is not a de Polignac number, because 86861601 - 2¹⁰ = 86860577 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86861603) 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 5 ways as a sum of consecutive naturals, for example, 4825636 + ... + 4825653.

Almost surely, 2^86861601 is an apocalyptic number.

It is an amenable number.

86861601 is a deficient number, since it is larger than the sum of its proper divisors (38605169).

86861601 is a wasteful number, since it uses less digits than its factorization.

86861601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9651295 (or 9651292 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 86861601 is about 9319.9571350946. The cubic root of 86861601 is about 442.8696748002.

The spelling of 86861601 in words is "eighty-six million, eight hundred sixty-one thousand, six hundred one".