87573437 has 12 divisors (see below), whose sum is σ = 103796316. Its totient is φ = 73644480.

The previous prime is 87573427. The next prime is 87573463. The reversal of 87573437 is 73437578.

It can be written as a sum of positive squares in 2 ways, for example, as 26327161 + 61246276 = 5131^2 + 7826^2 .

It is not a de Polignac number, because 87573437 - 2⁶ = 87573373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87573427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14264 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (8649693).

Almost surely, 2^87573437 is an apocalyptic number.

It is an amenable number.

87573437 is a deficient number, since it is larger than the sum of its proper divisors (16222879).

87573437 is a wasteful number, since it uses less digits than its factorization.

87573437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33788 (or 33781 counting only the distinct ones).

The product of its digits is 493920, while the sum is 44.

The square root of 87573437 is about 9358.0680164230. The cubic root of 87573437 is about 444.0761661531.

The spelling of 87573437 in words is "eighty-seven million, five hundred seventy-three thousand, four hundred thirty-seven".