87501317 has 4 divisors (see below), whose sum is σ = 87571116. Its totient is φ = 87431520.

The previous prime is 87501299. The next prime is 87501331. The reversal of 87501317 is 71310578.

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 74891716 + 12609601 = 8654^2 + 3551^2 .

It is a cyclic number.

It is not a de Polignac number, because 87501317 - 2¹⁶ = 87435781 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 (87501367) 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, 32984 + ... + 35537.

It is an arithmetic number, because the mean of its divisors is an integer number (21892779).

Almost surely, 2^87501317 is an apocalyptic number.

It is an amenable number.

87501317 is a deficient number, since it is larger than the sum of its proper divisors (69799).

87501317 is a wasteful number, since it uses less digits than its factorization.

87501317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69798.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 87501317 is about 9354.2138632811. The cubic root of 87501317 is about 443.9542282307.

The spelling of 87501317 in words is "eighty-seven million, five hundred one thousand, three hundred seventeen".