872605345 has 4 divisors (see below), whose sum is σ = 1047126420. Its totient is φ = 698084272.

The previous prime is 872605319. The next prime is 872605351. The reversal of 872605345 is 543506278.

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 654541056 + 218064289 = 25584^2 + 14767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872605345 is a prime.

It is a super-2 number, since 2×872605345² = 1522880176245138050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 872605298 and 872605307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87260530 + ... + 87260539.

It is an arithmetic number, because the mean of its divisors is an integer number (261781605).

Almost surely, 2^872605345 is an apocalyptic number.

It is an amenable number.

872605345 is a deficient number, since it is larger than the sum of its proper divisors (174521075).

872605345 is a wasteful number, since it uses less digits than its factorization.

872605345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174521074.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 872605345 is about 29539.8941264183. The cubic root of 872605345 is about 955.5922589236.

The spelling of 872605345 in words is "eight hundred seventy-two million, six hundred five thousand, three hundred forty-five".