87643523 has 16 divisors (see below), whose sum is σ = 101322240. Its totient is φ = 74973600.

The previous prime is 87643511. The next prime is 87643529. The reversal of 87643523 is 32534678.

It is a cyclic number.

It is not a de Polignac number, because 87643523 - 2⁶ = 87643459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87643529) 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 15 ways as a sum of consecutive naturals, for example, 31478 + ... + 34148.

It is an arithmetic number, because the mean of its divisors is an integer number (6332640).

Almost surely, 2^87643523 is an apocalyptic number.

87643523 is a deficient number, since it is larger than the sum of its proper divisors (13678717).

87643523 is a wasteful number, since it uses less digits than its factorization.

87643523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858.

The product of its digits is 120960, while the sum is 38.

The square root of 87643523 is about 9361.8119506856. The cubic root of 87643523 is about 444.1946009361.

The spelling of 87643523 in words is "eighty-seven million, six hundred forty-three thousand, five hundred twenty-three".