87099525 has 18 divisors (see below), whose sum is σ = 156005330. Its totient is φ = 46452960.

The previous prime is 87099469. The next prime is 87099527. The reversal of 87099525 is 52599078.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 29354724 + 57744801 = 5418^2 + 7599^2 .

It is not a de Polignac number, because 87099525 - 2¹² = 87095429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87099527) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 193330 + ... + 193779.

Almost surely, 2^87099525 is an apocalyptic number.

It is an amenable number.

87099525 is a deficient number, since it is larger than the sum of its proper divisors (68905805).

87099525 is a wasteful number, since it uses less digits than its factorization.

87099525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387125 (or 387117 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 87099525 is about 9332.7126281698. The cubic root of 87099525 is about 443.2736633029.

The spelling of 87099525 in words is "eighty-seven million, ninety-nine thousand, five hundred twenty-five".