86868157 has 2 divisors, whose sum is σ = 86868158. Its totient is φ = 86868156.

The previous prime is 86868151. The next prime is 86868167. The reversal of 86868157 is 75186868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58767556 + 28100601 = 7666^2 + 5301^2 .

It is a cyclic number.

It is not a de Polignac number, because 86868157 - 2³ = 86868149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86868157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86868151) 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 as a sum of consecutive naturals, namely, 43434078 + 43434079.

It is an arithmetic number, because the mean of its divisors is an integer number (43434079).

Almost surely, 2^86868157 is an apocalyptic number.

It is an amenable number.

86868157 is a deficient number, since it is larger than the sum of its proper divisors (1).

86868157 is an equidigital number, since it uses as much as digits as its factorization.

86868157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 49.

The square root of 86868157 is about 9320.3088468140. The cubic root of 86868157 is about 442.8808165879.

It can be divided in two parts, 86868 and 157, that added together give a square (87025 = 295²).

The spelling of 86868157 in words is "eighty-six million, eight hundred sixty-eight thousand, one hundred fifty-seven".