87617245 has 4 divisors (see below), whose sum is σ = 105140700. Its totient is φ = 70093792.

The previous prime is 87617203. The next prime is 87617249. The reversal of 87617245 is 54271678.

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 35748441 + 51868804 = 5979^2 + 7202^2 .

It is a cyclic number.

It is not a de Polignac number, because 87617245 - 2¹¹ = 87615197 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 87617198 and 87617207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87617249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8761720 + ... + 8761729.

It is an arithmetic number, because the mean of its divisors is an integer number (26285175).

Almost surely, 2^87617245 is an apocalyptic number.

It is an amenable number.

87617245 is a deficient number, since it is larger than the sum of its proper divisors (17523455).

87617245 is a wasteful number, since it uses less digits than its factorization.

87617245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17523454.

The product of its digits is 94080, while the sum is 40.

The square root of 87617245 is about 9360.4083778434. The cubic root of 87617245 is about 444.1502024755.

The spelling of 87617245 in words is "eighty-seven million, six hundred seventeen thousand, two hundred forty-five".