86718553 has 2 divisors, whose sum is σ = 86718554. Its totient is φ = 86718552.

The previous prime is 86718551. The next prime is 86718557. The reversal of 86718553 is 35581768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83229129 + 3489424 = 9123^2 + 1868^2 .

It is a cyclic number.

It is not a de Polignac number, because 86718553 - 2¹ = 86718551 is a prime.

Together with 86718551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86718551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43359276 + 43359277.

It is an arithmetic number, because the mean of its divisors is an integer number (43359277).

Almost surely, 2^86718553 is an apocalyptic number.

It is an amenable number.

86718553 is a deficient number, since it is larger than the sum of its proper divisors (1).

86718553 is an equidigital number, since it uses as much as digits as its factorization.

86718553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 86718553 is about 9312.2796886691. The cubic root of 86718553 is about 442.6264279599.

The spelling of 86718553 in words is "eighty-six million, seven hundred eighteen thousand, five hundred fifty-three".