143987729 has 2 divisors, whose sum is σ = 143987730. Its totient is φ = 143987728.

The previous prime is 143987699. The next prime is 143987741. The reversal of 143987729 is 927789341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138697729 + 5290000 = 11777^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 143987729 - 2¹² = 143983633 is a prime.

It is a super-2 number, since 2×143987729² = 41464932205154882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143987749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71993864 + 71993865.

It is an arithmetic number, because the mean of its divisors is an integer number (71993865).

Almost surely, 2^143987729 is an apocalyptic number.

It is an amenable number.

143987729 is a deficient number, since it is larger than the sum of its proper divisors (1).

143987729 is an equidigital number, since it uses as much as digits as its factorization.

143987729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 143987729 is about 11999.4886974404. The cubic root of 143987729 is about 524.1333899385.

The spelling of 143987729 in words is "one hundred forty-three million, nine hundred eighty-seven thousand, seven hundred twenty-nine".