873143389 has 2 divisors, whose sum is σ = 873143390. Its totient is φ = 873143388.

The previous prime is 873143377. The next prime is 873143413. The reversal of 873143389 is 983341378.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 811395225 + 61748164 = 28485^2 + 7858^2 .

It is a cyclic number.

It is not a de Polignac number, because 873143389 - 2⁵ = 873143357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873143329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436571694 + 436571695.

It is an arithmetic number, because the mean of its divisors is an integer number (436571695).

Almost surely, 2^873143389 is an apocalyptic number.

It is an amenable number.

873143389 is a deficient number, since it is larger than the sum of its proper divisors (1).

873143389 is an equidigital number, since it uses as much as digits as its factorization.

873143389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 873143389 is about 29548.9997969474. Note that the first 3 decimals coincide. The cubic root of 873143389 is about 955.7886230059.

The spelling of 873143389 in words is "eight hundred seventy-three million, one hundred forty-three thousand, three hundred eighty-nine".