86743661 has 2 divisors, whose sum is σ = 86743662. Its totient is φ = 86743660.

The previous prime is 86743633. The next prime is 86743663. The reversal of 86743661 is 16634768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63520900 + 23222761 = 7970^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 86743661 - 2¹⁸ = 86481517 is a prime.

Together with 86743663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86743663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43371830 + 43371831.

It is an arithmetic number, because the mean of its divisors is an integer number (43371831).

Almost surely, 2^86743661 is an apocalyptic number.

It is an amenable number.

86743661 is a deficient number, since it is larger than the sum of its proper divisors (1).

86743661 is an equidigital number, since it uses as much as digits as its factorization.

86743661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 86743661 is about 9313.6277035321. The cubic root of 86743661 is about 442.6691423563.

The spelling of 86743661 in words is "eighty-six million, seven hundred forty-three thousand, six hundred sixty-one".