873622621 has 2 divisors, whose sum is σ = 873622622. Its totient is φ = 873622620.

The previous prime is 873622613. The next prime is 873622637. The reversal of 873622621 is 126226378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853282521 + 20340100 = 29211^2 + 4510^2 .

It is a cyclic number.

It is not a de Polignac number, because 873622621 - 2³ = 873622613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873622601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436811310 + 436811311.

It is an arithmetic number, because the mean of its divisors is an integer number (436811311).

Almost surely, 2^873622621 is an apocalyptic number.

It is an amenable number.

873622621 is a deficient number, since it is larger than the sum of its proper divisors (1).

873622621 is an equidigital number, since it uses as much as digits as its factorization.

873622621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 873622621 is about 29557.1077915279. The cubic root of 873622621 is about 955.9634551981.

Adding to 873622621 its reverse (126226378), we get a palindrome (999848999).

The spelling of 873622621 in words is "eight hundred seventy-three million, six hundred twenty-two thousand, six hundred twenty-one".