87917443 has 2 divisors, whose sum is σ = 87917444. Its totient is φ = 87917442.

The previous prime is 87917411. The next prime is 87917447. The reversal of 87917443 is 34471978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87917443 - 2⁵ = 87917411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87917443.

It is not a weakly prime, because it can be changed into another prime (87917447) 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, 43958721 + 43958722.

It is an arithmetic number, because the mean of its divisors is an integer number (43958722).

Almost surely, 2^87917443 is an apocalyptic number.

87917443 is a deficient number, since it is larger than the sum of its proper divisors (1).

87917443 is an equidigital number, since it uses as much as digits as its factorization.

87917443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 87917443 is about 9376.4301842439. The cubic root of 87917443 is about 444.6568798029.

The spelling of 87917443 in words is "eighty-seven million, nine hundred seventeen thousand, four hundred forty-three".