873380821 has 2 divisors, whose sum is σ = 873380822. Its totient is φ = 873380820.

The previous prime is 873380803. The next prime is 873380839. The reversal of 873380821 is 128083378.

It is a balanced prime because it is at equal distance from previous prime (873380803) and next prime (873380839).

It can be written as a sum of positive squares in only one way, i.e., 518472900 + 354907921 = 22770^2 + 18839^2 .

It is a cyclic number.

It is not a de Polignac number, because 873380821 - 2⁵ = 873380789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873383821) 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, 436690410 + 436690411.

It is an arithmetic number, because the mean of its divisors is an integer number (436690411).

Almost surely, 2^873380821 is an apocalyptic number.

It is an amenable number.

873380821 is a deficient number, since it is larger than the sum of its proper divisors (1).

873380821 is an equidigital number, since it uses as much as digits as its factorization.

873380821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 873380821 is about 29553.0171217762. The cubic root of 873380821 is about 955.8752503344.

The spelling of 873380821 in words is "eight hundred seventy-three million, three hundred eighty thousand, eight hundred twenty-one".