86878387 has 2 divisors, whose sum is σ = 86878388. Its totient is φ = 86878386.

The previous prime is 86878373. The next prime is 86878409. The reversal of 86878387 is 78387868.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86878387 is a prime.

It is a nialpdrome in base 14.

It is not a weakly prime, because it can be changed into another prime (86878327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43439193 + 43439194.

It is an arithmetic number, because the mean of its divisors is an integer number (43439194).

Almost surely, 2^86878387 is an apocalyptic number.

86878387 is a deficient number, since it is larger than the sum of its proper divisors (1).

86878387 is an equidigital number, since it uses as much as digits as its factorization.

86878387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 55.

The square root of 86878387 is about 9320.8576322139. The cubic root of 86878387 is about 442.8982011435.

The spelling of 86878387 in words is "eighty-six million, eight hundred seventy-eight thousand, three hundred eighty-seven".