87687269 has 2 divisors, whose sum is σ = 87687270. Its totient is φ = 87687268.

The previous prime is 87687239. The next prime is 87687283. The reversal of 87687269 is 96278678.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83484769 + 4202500 = 9137^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 87687269 - 2⁸ = 87687013 is a prime.

It is a super-2 number, since 2×87687269² = 15378114289356722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87687269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87687239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43843634 + 43843635.

It is an arithmetic number, because the mean of its divisors is an integer number (43843635).

Almost surely, 2^87687269 is an apocalyptic number.

It is an amenable number.

87687269 is a deficient number, since it is larger than the sum of its proper divisors (1).

87687269 is an equidigital number, since it uses as much as digits as its factorization.

87687269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 53.

The square root of 87687269 is about 9364.1480658947. The cubic root of 87687269 is about 444.2684930855.

The spelling of 87687269 in words is "eighty-seven million, six hundred eighty-seven thousand, two hundred sixty-nine".