86744641 has 2 divisors, whose sum is σ = 86744642. Its totient is φ = 86744640.

The previous prime is 86744639. The next prime is 86744677. The reversal of 86744641 is 14644768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 14409616 = 8505^2 + 3796^2 .

It is a cyclic number.

It is not a de Polignac number, because 86744641 - 2¹ = 86744639 is a prime.

Together with 86744639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 86744594 and 86744603.

It is not a weakly prime, because it can be changed into another prime (86744611) 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, 43372320 + 43372321.

It is an arithmetic number, because the mean of its divisors is an integer number (43372321).

Almost surely, 2^86744641 is an apocalyptic number.

It is an amenable number.

86744641 is a deficient number, since it is larger than the sum of its proper divisors (1).

86744641 is an equidigital number, since it uses as much as digits as its factorization.

86744641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 40.

The square root of 86744641 is about 9313.6803144622. The cubic root of 86744641 is about 442.6708093912.

The spelling of 86744641 in words is "eighty-six million, seven hundred forty-four thousand, six hundred forty-one".