87768647 has 2 divisors, whose sum is σ = 87768648. Its totient is φ = 87768646.

The previous prime is 87768613. The next prime is 87768673. The reversal of 87768647 is 74686778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87768647 - 2¹⁰ = 87767623 is a prime.

It is a super-3 number, since 3×87768647³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87764647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43884323 + 43884324.

It is an arithmetic number, because the mean of its divisors is an integer number (43884324).

Almost surely, 2^87768647 is an apocalyptic number.

87768647 is a deficient number, since it is larger than the sum of its proper divisors (1).

87768647 is an equidigital number, since it uses as much as digits as its factorization.

87768647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3161088, while the sum is 53.

The square root of 87768647 is about 9368.4922479554. The cubic root of 87768647 is about 444.4058847635.

The spelling of 87768647 in words is "eighty-seven million, seven hundred sixty-eight thousand, six hundred forty-seven".