143985797 has 2 divisors, whose sum is σ = 143985798. Its totient is φ = 143985796.

The previous prime is 143985757. The next prime is 143985859. The reversal of 143985797 is 797589341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110796676 + 33189121 = 10526^2 + 5761^2 .

It is an emirp because it is prime and its reverse (797589341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143985797 - 2¹⁰ = 143984773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143985707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71992898 + 71992899.

It is an arithmetic number, because the mean of its divisors is an integer number (71992899).

Almost surely, 2^143985797 is an apocalyptic number.

It is an amenable number.

143985797 is a deficient number, since it is larger than the sum of its proper divisors (1).

143985797 is an equidigital number, since it uses as much as digits as its factorization.

143985797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 143985797 is about 11999.4081937402. The cubic root of 143985797 is about 524.1310456872.

The spelling of 143985797 in words is "one hundred forty-three million, nine hundred eighty-five thousand, seven hundred ninety-seven".