143428973 has 2 divisors, whose sum is σ = 143428974. Its totient is φ = 143428972.

The previous prime is 143428969. The next prime is 143428997. The reversal of 143428973 is 379824341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117896164 + 25532809 = 10858^2 + 5053^2 .

It is a cyclic number.

It is not a de Polignac number, because 143428973 - 2² = 143428969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143428973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143428933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71714486 + 71714487.

It is an arithmetic number, because the mean of its divisors is an integer number (71714487).

Almost surely, 2^143428973 is an apocalyptic number.

It is an amenable number.

143428973 is a deficient number, since it is larger than the sum of its proper divisors (1).

143428973 is an equidigital number, since it uses as much as digits as its factorization.

143428973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 143428973 is about 11976.1835740773. The cubic root of 143428973 is about 523.4545304203.

The spelling of 143428973 in words is "one hundred forty-three million, four hundred twenty-eight thousand, nine hundred seventy-three".