87812534 has 8 divisors (see below), whose sum is σ = 131780088. Its totient is φ = 43885840.

The previous prime is 87812533. The next prime is 87812561. The reversal of 87812534 is 43521878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×87812534² = 15422082255002312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87812533) 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 3 ways as a sum of consecutive naturals, for example, 4112 + ... + 13875.

It is an arithmetic number, because the mean of its divisors is an integer number (16472511).

Almost surely, 2^87812534 is an apocalyptic number.

87812534 is a deficient number, since it is larger than the sum of its proper divisors (43967554).

87812534 is a wasteful number, since it uses less digits than its factorization.

87812534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20430.

The product of its digits is 53760, while the sum is 38.

The square root of 87812534 is about 9370.8342211353. The cubic root of 87812534 is about 444.4799445856.

The spelling of 87812534 in words is "eighty-seven million, eight hundred twelve thousand, five hundred thirty-four".