87686047 has 2 divisors, whose sum is σ = 87686048. Its totient is φ = 87686046.

The previous prime is 87686033. The next prime is 87686059. The reversal of 87686047 is 74068678.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87686047 is a prime.

It is a super-3 number, since 3×87686047³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87685988 and 87686006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87686077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43843023 + 43843024.

It is an arithmetic number, because the mean of its divisors is an integer number (43843024).

Almost surely, 2^87686047 is an apocalyptic number.

87686047 is a deficient number, since it is larger than the sum of its proper divisors (1).

87686047 is an equidigital number, since it uses as much as digits as its factorization.

87686047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 87686047 is about 9364.0828168059. The cubic root of 87686047 is about 444.2664293172.

The spelling of 87686047 in words is "eighty-seven million, six hundred eighty-six thousand, forty-seven".