872072609 has 2 divisors, whose sum is σ = 872072610. Its totient is φ = 872072608.

The previous prime is 872072599. The next prime is 872072629. The reversal of 872072609 is 906270278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793661584 + 78411025 = 28172^2 + 8855^2 .

It is a cyclic number.

It is not a de Polignac number, because 872072609 - 2¹² = 872068513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (872072629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436036304 + 436036305.

It is an arithmetic number, because the mean of its divisors is an integer number (436036305).

Almost surely, 2^872072609 is an apocalyptic number.

It is an amenable number.

872072609 is a deficient number, since it is larger than the sum of its proper divisors (1).

872072609 is an equidigital number, since it uses as much as digits as its factorization.

872072609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 872072609 is about 29530.8755203770. The cubic root of 872072609 is about 955.3977525009.

The spelling of 872072609 in words is "eight hundred seventy-two million, seventy-two thousand, six hundred nine".