872104870649 has 2 divisors, whose sum is σ = 872104870650. Its totient is φ = 872104870648.

The previous prime is 872104870621. The next prime is 872104870727. The reversal of 872104870649 is 946078401278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662278578025 + 209826292624 = 813805^2 + 458068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872104870649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 872104870594 and 872104870603.

It is not a weakly prime, because it can be changed into another prime (872104800649) 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, 436052435324 + 436052435325.

It is an arithmetic number, because the mean of its divisors is an integer number (436052435325).

Almost surely, 2^872104870649 is an apocalyptic number.

It is an amenable number.

872104870649 is a deficient number, since it is larger than the sum of its proper divisors (1).

872104870649 is an equidigital number, since it uses as much as digits as its factorization.

872104870649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 872104870649 in words is "eight hundred seventy-two billion, one hundred four million, eight hundred seventy thousand, six hundred forty-nine".