87685747 has 2 divisors, whose sum is σ = 87685748. Its totient is φ = 87685746.

The previous prime is 87685739. The next prime is 87685789. The reversal of 87685747 is 74758678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87685747 - 2³ = 87685739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87685694 and 87685703.

It is not a weakly prime, because it can be changed into another prime (87685727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43842873 + 43842874.

It is an arithmetic number, because the mean of its divisors is an integer number (43842874).

Almost surely, 2^87685747 is an apocalyptic number.

87685747 is a deficient number, since it is larger than the sum of its proper divisors (1).

87685747 is an equidigital number, since it uses as much as digits as its factorization.

87685747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2634240, while the sum is 52.

The square root of 87685747 is about 9364.0667981385. The cubic root of 87685747 is about 444.2659226608.

The spelling of 87685747 in words is "eighty-seven million, six hundred eighty-five thousand, seven hundred forty-seven".