143728973 has 2 divisors, whose sum is σ = 143728974. Its totient is φ = 143728972.

The previous prime is 143728967. The next prime is 143728987. The reversal of 143728973 is 379827341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143688169 + 40804 = 11987^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 143728973 - 2²⁰ = 142680397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143728913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71864486 + 71864487.

It is an arithmetic number, because the mean of its divisors is an integer number (71864487).

Almost surely, 2^143728973 is an apocalyptic number.

It is an amenable number.

143728973 is a deficient number, since it is larger than the sum of its proper divisors (1).

143728973 is an equidigital number, since it uses as much as digits as its factorization.

143728973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 143728973 is about 11988.7018896960. The cubic root of 143728973 is about 523.8192335801.

The spelling of 143728973 in words is "one hundred forty-three million, seven hundred twenty-eight thousand, nine hundred seventy-three".