87805047 has 32 divisors (see below), whose sum is σ = 132420096. Its totient is φ = 51292800.

The previous prime is 87805043. The next prime is 87805063. The reversal of 87805047 is 74050878.

It is not a de Polignac number, because 87805047 - 2² = 87805043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87804996 and 87805014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87805043) 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 in 31 ways as a sum of consecutive naturals, for example, 106278 + ... + 107100.

It is an arithmetic number, because the mean of its divisors is an integer number (4138128).

Almost surely, 2^87805047 is an apocalyptic number.

87805047 is a deficient number, since it is larger than the sum of its proper divisors (44615049).

87805047 is a wasteful number, since it uses less digits than its factorization.

87805047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 87805047 is about 9370.4347284424. The cubic root of 87805047 is about 444.4673119322.

The spelling of 87805047 in words is "eighty-seven million, eight hundred five thousand, forty-seven".