87533823 has 16 divisors (see below), whose sum is σ = 129088736. Its totient is φ = 52410240.

The previous prime is 87533819. The next prime is 87533827. The reversal of 87533823 is 32833578.

It is an interprime number because it is at equal distance from previous prime (87533819) and next prime (87533827).

It is not a de Polignac number, because 87533823 - 2² = 87533819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87533827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28888 + ... + 31773.

It is an arithmetic number, because the mean of its divisors is an integer number (8068046).

Almost surely, 2^87533823 is an apocalyptic number.

87533823 is a deficient number, since it is larger than the sum of its proper divisors (41554913).

87533823 is a wasteful number, since it uses less digits than its factorization.

87533823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60714.

The product of its digits is 120960, while the sum is 39.

The square root of 87533823 is about 9355.9512076539. The cubic root of 87533823 is about 444.0091965062.

The spelling of 87533823 in words is "eighty-seven million, five hundred thirty-three thousand, eight hundred twenty-three".