86987447 has 2 divisors, whose sum is σ = 86987448. Its totient is φ = 86987446.

The previous prime is 86987431. The next prime is 86987471. The reversal of 86987447 is 74478968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86987447 - 2⁴ = 86987431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86987497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43493723 + 43493724.

It is an arithmetic number, because the mean of its divisors is an integer number (43493724).

Almost surely, 2^86987447 is an apocalyptic number.

86987447 is a deficient number, since it is larger than the sum of its proper divisors (1).

86987447 is an equidigital number, since it uses as much as digits as its factorization.

86987447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 53.

The square root of 86987447 is about 9326.7061173814. The cubic root of 86987447 is about 443.0834496727.

The spelling of 86987447 in words is "eighty-six million, nine hundred eighty-seven thousand, four hundred forty-seven".