87766241 has 2 divisors, whose sum is σ = 87766242. Its totient is φ = 87766240.

The previous prime is 87766169. The next prime is 87766243. The reversal of 87766241 is 14266778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80928016 + 6838225 = 8996^2 + 2615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87766241 is a prime.

Together with 87766243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87766243) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43883120 + 43883121.

It is an arithmetic number, because the mean of its divisors is an integer number (43883121).

Almost surely, 2^87766241 is an apocalyptic number.

It is an amenable number.

87766241 is a deficient number, since it is larger than the sum of its proper divisors (1).

87766241 is an equidigital number, since it uses as much as digits as its factorization.

87766241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 87766241 is about 9368.3638379388. The cubic root of 87766241 is about 444.4018238968.

The spelling of 87766241 in words is "eighty-seven million, seven hundred sixty-six thousand, two hundred forty-one".