873673421 has 2 divisors, whose sum is σ = 873673422. Its totient is φ = 873673420.

The previous prime is 873673397. The next prime is 873673429. The reversal of 873673421 is 124376378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741745225 + 131928196 = 27235^2 + 11486^2 .

It is a cyclic number.

It is not a de Polignac number, because 873673421 - 2¹⁸ = 873411277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873673429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436836710 + 436836711.

It is an arithmetic number, because the mean of its divisors is an integer number (436836711).

Almost surely, 2^873673421 is an apocalyptic number.

It is an amenable number.

873673421 is a deficient number, since it is larger than the sum of its proper divisors (1).

873673421 is an equidigital number, since it uses as much as digits as its factorization.

873673421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 873673421 is about 29557.9671323993. The cubic root of 873673421 is about 955.9819841758.

The spelling of 873673421 in words is "eight hundred seventy-three million, six hundred seventy-three thousand, four hundred twenty-one".