872606609 has 4 divisors (see below), whose sum is σ = 997264704. Its totient is φ = 747948516.

The previous prime is 872606531. The next prime is 872606621. The reversal of 872606609 is 906606278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 872606609 - 2¹² = 872602513 is a prime.

It is a super-2 number, since 2×872606609² = 1522884588140957762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 872606609.

It is not an unprimeable number, because it can be changed into a prime (872606629) 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, 62329037 + ... + 62329050.

It is an arithmetic number, because the mean of its divisors is an integer number (249316176).

Almost surely, 2^872606609 is an apocalyptic number.

It is an amenable number.

872606609 is a deficient number, since it is larger than the sum of its proper divisors (124658095).

872606609 is a wasteful number, since it uses less digits than its factorization.

872606609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124658094.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 872606609 is about 29539.9155212062. The cubic root of 872606609 is about 955.5927203265.

The spelling of 872606609 in words is "eight hundred seventy-two million, six hundred six thousand, six hundred nine".