86944129 has 2 divisors, whose sum is σ = 86944130. Its totient is φ = 86944128.

The previous prime is 86944097. The next prime is 86944147. The reversal of 86944129 is 92144968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 22543504 = 8025^2 + 4748^2 .

It is a cyclic number.

It is not a de Polignac number, because 86944129 - 2⁵ = 86944097 is a prime.

It is not a weakly prime, because it can be changed into another prime (86944159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43472064 + 43472065.

It is an arithmetic number, because the mean of its divisors is an integer number (43472065).

Almost surely, 2^86944129 is an apocalyptic number.

It is an amenable number.

86944129 is a deficient number, since it is larger than the sum of its proper divisors (1).

86944129 is an equidigital number, since it uses as much as digits as its factorization.

86944129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 86944129 is about 9324.3835721189. The cubic root of 86944129 is about 443.0098885770.

The spelling of 86944129 in words is "eighty-six million, nine hundred forty-four thousand, one hundred twenty-nine".