87966643 has 2 divisors, whose sum is σ = 87966644. Its totient is φ = 87966642.

The previous prime is 87966617. The next prime is 87966647. The reversal of 87966643 is 34666978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87966643 - 2⁵ = 87966611 is a prime.

It is not a weakly prime, because it can be changed into another prime (87966647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43983321 + 43983322.

It is an arithmetic number, because the mean of its divisors is an integer number (43983322).

Almost surely, 2^87966643 is an apocalyptic number.

87966643 is a deficient number, since it is larger than the sum of its proper divisors (1).

87966643 is an equidigital number, since it uses as much as digits as its factorization.

87966643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The square root of 87966643 is about 9379.0534170565. The cubic root of 87966643 is about 444.7398100235.

The spelling of 87966643 in words is "eighty-seven million, nine hundred sixty-six thousand, six hundred forty-three".