87645667 has 2 divisors, whose sum is σ = 87645668. Its totient is φ = 87645666.

The previous prime is 87645661. The next prime is 87645671. The reversal of 87645667 is 76654678.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87645667 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87645667.

It is not a weakly prime, because it can be changed into another prime (87645661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43822833 + 43822834.

It is an arithmetic number, because the mean of its divisors is an integer number (43822834).

Almost surely, 2^87645667 is an apocalyptic number.

87645667 is a deficient number, since it is larger than the sum of its proper divisors (1).

87645667 is an equidigital number, since it uses as much as digits as its factorization.

87645667 is an evil number, because the sum of its binary digits is even.

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

The square root of 87645667 is about 9361.9264577329. The cubic root of 87645667 is about 444.1982229777.

The spelling of 87645667 in words is "eighty-seven million, six hundred forty-five thousand, six hundred sixty-seven".