872092709 has 2 divisors, whose sum is σ = 872092710. Its totient is φ = 872092708.

The previous prime is 872092667. The next prime is 872092729. The reversal of 872092709 is 907290278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440076484 + 432016225 = 20978^2 + 20785^2 .

It is a cyclic number.

It is not a de Polignac number, because 872092709 - 2²⁰ = 871044133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

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 872092709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872092729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436046354 + 436046355.

It is an arithmetic number, because the mean of its divisors is an integer number (436046355).

Almost surely, 2^872092709 is an apocalyptic number.

It is an amenable number.

872092709 is a deficient number, since it is larger than the sum of its proper divisors (1).

872092709 is an equidigital number, since it uses as much as digits as its factorization.

872092709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 872092709 is about 29531.2158401919. The cubic root of 872092709 is about 955.4050926188.

The spelling of 872092709 in words is "eight hundred seventy-two million, ninety-two thousand, seven hundred nine".