872508205 has 4 divisors (see below), whose sum is σ = 1047009852. Its totient is φ = 698006560.

The previous prime is 872508127. The next prime is 872508209. The reversal of 872508205 is 502805278.

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 676676169 + 195832036 = 26013^2 + 13994^2 .

It is not a de Polignac number, because 872508205 - 2¹¹ = 872506157 is a prime.

It is a super-2 number, since 2×872508205² = 1522541135584644050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872508209) 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, 87250816 + ... + 87250825.

It is an arithmetic number, because the mean of its divisors is an integer number (261752463).

Almost surely, 2^872508205 is an apocalyptic number.

It is an amenable number.

872508205 is a deficient number, since it is larger than the sum of its proper divisors (174501647).

872508205 is a wasteful number, since it uses less digits than its factorization.

872508205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174501646.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 872508205 is about 29538.2498635244. The cubic root of 872508205 is about 955.5567981901.

The spelling of 872508205 in words is "eight hundred seventy-two million, five hundred eight thousand, two hundred five".