87664567 has 2 divisors, whose sum is σ = 87664568. Its totient is φ = 87664566.

The previous prime is 87664553. The next prime is 87664589. The reversal of 87664567 is 76546678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87664567 - 2⁷ = 87664439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87664567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87664867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43832283 + 43832284.

It is an arithmetic number, because the mean of its divisors is an integer number (43832284).

Almost surely, 2^87664567 is an apocalyptic number.

87664567 is a deficient number, since it is larger than the sum of its proper divisors (1).

87664567 is an equidigital number, since it uses as much as digits as its factorization.

87664567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 49.

The square root of 87664567 is about 9362.9358109516. The cubic root of 87664567 is about 444.2301498005.

The spelling of 87664567 in words is "eighty-seven million, six hundred sixty-four thousand, five hundred sixty-seven".