872784146849 has 2 divisors, whose sum is σ = 872784146850. Its totient is φ = 872784146848.

The previous prime is 872784146833. The next prime is 872784146879. The reversal of 872784146849 is 948641487278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511110606400 + 361673540449 = 714920^2 + 601393^2 .

It is a cyclic number.

It is not a de Polignac number, because 872784146849 - 2⁴ = 872784146833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (872784146809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436392073424 + 436392073425.

It is an arithmetic number, because the mean of its divisors is an integer number (436392073425).

Almost surely, 2^872784146849 is an apocalyptic number.

It is an amenable number.

872784146849 is a deficient number, since it is larger than the sum of its proper divisors (1).

872784146849 is an equidigital number, since it uses as much as digits as its factorization.

872784146849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 173408256, while the sum is 68.

The spelling of 872784146849 in words is "eight hundred seventy-two billion, seven hundred eighty-four million, one hundred forty-six thousand, eight hundred forty-nine".