923721143 has 2 divisors, whose sum is σ = 923721144. Its totient is φ = 923721142.

The previous prime is 923721131. The next prime is 923721151. The reversal of 923721143 is 341127329.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 923721143 - 2²⁰ = 922672567 is a prime.

It is a super-3 number, since 3×923721143³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (923721343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461860571 + 461860572.

It is an arithmetic number, because the mean of its divisors is an integer number (461860572).

Almost surely, 2^923721143 is an apocalyptic number.

923721143 is a deficient number, since it is larger than the sum of its proper divisors (1).

923721143 is an equidigital number, since it uses as much as digits as its factorization.

923721143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 923721143 is about 30392.7811001231. The cubic root of 923721143 is about 973.8983456263.

The spelling of 923721143 in words is "nine hundred twenty-three million, seven hundred twenty-one thousand, one hundred forty-three".