87287693 has 2 divisors, whose sum is σ = 87287694. Its totient is φ = 87287692.

The previous prime is 87287689. The next prime is 87287713. The reversal of 87287693 is 39678278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84235684 + 3052009 = 9178^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 87287693 - 2² = 87287689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87287623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43643846 + 43643847.

It is an arithmetic number, because the mean of its divisors is an integer number (43643847).

Almost surely, 2^87287693 is an apocalyptic number.

It is an amenable number.

87287693 is a deficient number, since it is larger than the sum of its proper divisors (1).

87287693 is an equidigital number, since it uses as much as digits as its factorization.

87287693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 87287693 is about 9342.7882883002. The cubic root of 87287693 is about 443.5926467683.

The spelling of 87287693 in words is "eighty-seven million, two hundred eighty-seven thousand, six hundred ninety-three".