86488561 has 2 divisors, whose sum is σ = 86488562. Its totient is φ = 86488560.

The previous prime is 86488559. The next prime is 86488583. The reversal of 86488561 is 16588468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 6922161 = 8920^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 86488561 - 2¹ = 86488559 is a prime.

Together with 86488559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86488531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43244280 + 43244281.

It is an arithmetic number, because the mean of its divisors is an integer number (43244281).

Almost surely, 2^86488561 is an apocalyptic number.

It is an amenable number.

86488561 is a deficient number, since it is larger than the sum of its proper divisors (1).

86488561 is an equidigital number, since it uses as much as digits as its factorization.

86488561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 46.

The square root of 86488561 is about 9299.9226340868. The cubic root of 86488561 is about 442.2347752549.

The spelling of 86488561 in words is "eighty-six million, four hundred eighty-eight thousand, five hundred sixty-one".