87865602443 has 2 divisors, whose sum is σ = 87865602444. Its totient is φ = 87865602442.

The previous prime is 87865602361. The next prime is 87865602479. The reversal of 87865602443 is 34420656878.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87865602443 - 2¹⁰ = 87865601419 is a prime.

It is not a weakly prime, because it can be changed into another prime (87865602043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43932801221 + 43932801222.

It is an arithmetic number, because the mean of its divisors is an integer number (43932801222).

Almost surely, 2^87865602443 is an apocalyptic number.

87865602443 is a deficient number, since it is larger than the sum of its proper divisors (1).

87865602443 is an equidigital number, since it uses as much as digits as its factorization.

87865602443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 87865602443 in words is "eighty-seven billion, eight hundred sixty-five million, six hundred two thousand, four hundred forty-three".