859878553 has 8 divisors (see below), whose sum is σ = 867645000. Its totient is φ = 852139008.

The previous prime is 859878541. The next prime is 859878563. The reversal of 859878553 is 355878958.

It can be written as a sum of positive squares in 4 ways, for example, as 7997584 + 851880969 = 2828^2 + 29187^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859878553 is a prime.

It is a super-2 number, since 2×859878553² = 1478782251818747618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859878533) 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 7 ways as a sum of consecutive naturals, for example, 60475 + ... + 73327.

It is an arithmetic number, because the mean of its divisors is an integer number (108455625).

Almost surely, 2^859878553 is an apocalyptic number.

It is an amenable number.

859878553 is a deficient number, since it is larger than the sum of its proper divisors (7766447).

859878553 is a wasteful number, since it uses less digits than its factorization.

859878553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13451.

The product of its digits is 12096000, while the sum is 58.

The square root of 859878553 is about 29323.6858699584. The cubic root of 859878553 is about 950.9237747502.

The spelling of 859878553 in words is "eight hundred fifty-nine million, eight hundred seventy-eight thousand, five hundred fifty-three".