143889457 has 2 divisors, whose sum is σ = 143889458. Its totient is φ = 143889456.

The previous prime is 143889439. The next prime is 143889467. The reversal of 143889457 is 754988341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99680256 + 44209201 = 9984^2 + 6649^2 .

It is an emirp because it is prime and its reverse (754988341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143889457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143889457.

It is not a weakly prime, because it can be changed into another prime (143889407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71944728 + 71944729.

It is an arithmetic number, because the mean of its divisors is an integer number (71944729).

Almost surely, 2^143889457 is an apocalyptic number.

It is an amenable number.

143889457 is a deficient number, since it is larger than the sum of its proper divisors (1).

143889457 is an equidigital number, since it uses as much as digits as its factorization.

143889457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 49.

The square root of 143889457 is about 11995.3931573750. The cubic root of 143889457 is about 524.0141219996.

The spelling of 143889457 in words is "one hundred forty-three million, eight hundred eighty-nine thousand, four hundred fifty-seven".