87433513 has 4 divisors (see below), whose sum is σ = 87482068. Its totient is φ = 87384960.

The previous prime is 87433481. The next prime is 87433523. The reversal of 87433513 is 31533478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48832144 + 38601369 = 6988^2 + 6213^2 .

It is a cyclic number.

It is not a de Polignac number, because 87433513 - 2⁵ = 87433481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87433523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21468 + ... + 25213.

It is an arithmetic number, because the mean of its divisors is an integer number (21870517).

Almost surely, 2^87433513 is an apocalyptic number.

It is an amenable number.

87433513 is a deficient number, since it is larger than the sum of its proper divisors (48555).

87433513 is a wasteful number, since it uses less digits than its factorization.

87433513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48554.

The product of its digits is 30240, while the sum is 34.

The square root of 87433513 is about 9350.5889119349. The cubic root of 87433513 is about 443.8395265245.

The spelling of 87433513 in words is "eighty-seven million, four hundred thirty-three thousand, five hundred thirteen".