87249573 has 12 divisors (see below), whose sum is σ = 126242688. Its totient is φ = 58066920.

The previous prime is 87249571. The next prime is 87249601. The reversal of 87249573 is 37594278.

87249573 is a `hidden beast` number, since 8 + 72 + 4 + 9 + 573 = 666.

It is not a de Polignac number, because 87249573 - 2¹ = 87249571 is a prime.

It is a super-2 number, since 2×87249573² = 15224975977364658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87249571) 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 11 ways as a sum of consecutive naturals, for example, 2523 + ... + 13448.

It is an arithmetic number, because the mean of its divisors is an integer number (10520224).

Almost surely, 2^87249573 is an apocalyptic number.

It is an amenable number.

87249573 is a deficient number, since it is larger than the sum of its proper divisors (38993115).

87249573 is a wasteful number, since it uses less digits than its factorization.

87249573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16584 (or 16581 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 87249573 is about 9340.7479893208. The cubic root of 87249573 is about 443.5280625820.

The spelling of 87249573 in words is "eighty-seven million, two hundred forty-nine thousand, five hundred seventy-three".