86881693 has 2 divisors, whose sum is σ = 86881694. Its totient is φ = 86881692.

The previous prime is 86881667. The next prime is 86881703. The reversal of 86881693 is 39618868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77475204 + 9406489 = 8802^2 + 3067^2 .

It is a cyclic number.

It is not a de Polignac number, because 86881693 - 2⁹ = 86881181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86881643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43440846 + 43440847.

It is an arithmetic number, because the mean of its divisors is an integer number (43440847).

Almost surely, 2^86881693 is an apocalyptic number.

It is an amenable number.

86881693 is a deficient number, since it is larger than the sum of its proper divisors (1).

86881693 is an equidigital number, since it uses as much as digits as its factorization.

86881693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 86881693 is about 9321.0349747225. The cubic root of 86881693 is about 442.9038189691.

The spelling of 86881693 in words is "eighty-six million, eight hundred eighty-one thousand, six hundred ninety-three".