8587873649 has 4 divisors (see below), whose sum is σ = 8588913060. Its totient is φ = 8586834240.

The previous prime is 8587873643. The next prime is 8587873661. The reversal of 8587873649 is 9463787858.

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 3129619249 + 5458254400 = 55943^2 + 73880^2 .

It is a cyclic number.

It is not a de Polignac number, because 8587873649 - 2¹⁶ = 8587808113 is a prime.

It is a super-2 number, since 2×8587873649² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8587873643) 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, 507212 + ... + 523869.

It is an arithmetic number, because the mean of its divisors is an integer number (2147228265).

Almost surely, 2^8587873649 is an apocalyptic number.

It is an amenable number.

8587873649 is a deficient number, since it is larger than the sum of its proper divisors (1039411).

8587873649 is a wasteful number, since it uses less digits than its factorization.

8587873649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039410.

The product of its digits is 81285120, while the sum is 65.

The square root of 8587873649 is about 92670.7809884000. The cubic root of 8587873649 is about 2047.8361978653.

The spelling of 8587873649 in words is "eight billion, five hundred eighty-seven million, eight hundred seventy-three thousand, six hundred forty-nine".