143728913 has 2 divisors, whose sum is σ = 143728914. Its totient is φ = 143728912.

The previous prime is 143728891. The next prime is 143728933. The reversal of 143728913 is 319827341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75550864 + 68178049 = 8692^2 + 8257^2 .

It is a cyclic number.

It is not a de Polignac number, because 143728913 - 2¹⁰ = 143727889 is a prime.

It is not a weakly prime, because it can be changed into another prime (143728933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71864456 + 71864457.

It is an arithmetic number, because the mean of its divisors is an integer number (71864457).

Almost surely, 2^143728913 is an apocalyptic number.

It is an amenable number.

143728913 is a deficient number, since it is larger than the sum of its proper divisors (1).

143728913 is an equidigital number, since it uses as much as digits as its factorization.

143728913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 143728913 is about 11988.6993873397. The cubic root of 143728913 is about 523.8191606902.

The spelling of 143728913 in words is "one hundred forty-three million, seven hundred twenty-eight thousand, nine hundred thirteen".