87013645 has 8 divisors (see below), whose sum is σ = 104474520. Its totient is φ = 69572160.

The previous prime is 87013643. The next prime is 87013649. The reversal of 87013645 is 54631078.

It can be written as a sum of positive squares in 4 ways, for example, as 635209 + 86378436 = 797^2 + 9294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87013645 - 2¹ = 87013643 is a prime.

It is a super-3 number, since 3×87013645³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87013645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87013643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8251 + ... + 15559.

It is an arithmetic number, because the mean of its divisors is an integer number (13059315).

Almost surely, 2^87013645 is an apocalyptic number.

It is an amenable number.

87013645 is a deficient number, since it is larger than the sum of its proper divisors (17460875).

87013645 is a wasteful number, since it uses less digits than its factorization.

87013645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9695.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 87013645 is about 9328.1104731880. The cubic root of 87013645 is about 443.1279263395.

The spelling of 87013645 in words is "eighty-seven million, thirteen thousand, six hundred forty-five".