87247313 has 4 divisors (see below), whose sum is σ = 87769920. Its totient is φ = 86724708.

The previous prime is 87247309. The next prime is 87247319. The reversal of 87247313 is 31374278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87247313 - 2² = 87247309 is a prime.

It is a super-2 number, since 2×87247313² = 15224187251439938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87247319) 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 3 ways as a sum of consecutive naturals, for example, 261053 + ... + 261386.

It is an arithmetic number, because the mean of its divisors is an integer number (21942480).

Almost surely, 2^87247313 is an apocalyptic number.

It is an amenable number.

87247313 is a deficient number, since it is larger than the sum of its proper divisors (522607).

87247313 is a wasteful number, since it uses less digits than its factorization.

87247313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522606.

The product of its digits is 28224, while the sum is 35.

The square root of 87247313 is about 9340.6270132149. The cubic root of 87247313 is about 443.5242330234.

The spelling of 87247313 in words is "eighty-seven million, two hundred forty-seven thousand, three hundred thirteen".