87648317 has 4 divisors (see below), whose sum is σ = 88452540. Its totient is φ = 86844096.

The previous prime is 87648299. The next prime is 87648329. The reversal of 87648317 is 71384678.

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 53787556 + 33860761 = 7334^2 + 5819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87648317 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 (87648347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401948 + ... + 402165.

It is an arithmetic number, because the mean of its divisors is an integer number (22113135).

Almost surely, 2^87648317 is an apocalyptic number.

It is an amenable number.

87648317 is a deficient number, since it is larger than the sum of its proper divisors (804223).

87648317 is a wasteful number, since it uses less digits than its factorization.

87648317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804222.

The product of its digits is 225792, while the sum is 44.

The square root of 87648317 is about 9362.0679873626. The cubic root of 87648317 is about 444.2026997665.

The spelling of 87648317 in words is "eighty-seven million, six hundred forty-eight thousand, three hundred seventeen".