87847461 has 24 divisors (see below), whose sum is σ = 139992216. Its totient is φ = 52738560.

The previous prime is 87847457. The next prime is 87847493. The reversal of 87847461 is 16474878.

It can be written as a sum of positive squares in 4 ways, for example, as 4124961 + 83722500 = 2031^2 + 9150^2 .

It is not a de Polignac number, because 87847461 - 2² = 87847457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87847451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4360 + ... + 13953.

It is an arithmetic number, because the mean of its divisors is an integer number (5833009).

Almost surely, 2^87847461 is an apocalyptic number.

It is an amenable number.

87847461 is a deficient number, since it is larger than the sum of its proper divisors (52144755).

87847461 is a wasteful number, since it uses less digits than its factorization.

87847461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18373 (or 18370 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 87847461 is about 9372.6976372867. The cubic root of 87847461 is about 444.5388666724.

The spelling of 87847461 in words is "eighty-seven million, eight hundred forty-seven thousand, four hundred sixty-one".