143464728721 has 2 divisors, whose sum is σ = 143464728722. Its totient is φ = 143464728720.

The previous prime is 143464728707. The next prime is 143464728727. The reversal of 143464728721 is 127827464341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89808102400 + 53656626321 = 299680^2 + 231639^2 .

It is a cyclic number.

It is not a de Polignac number, because 143464728721 - 2⁷ = 143464728593 is a prime.

It is not a weakly prime, because it can be changed into another prime (143464728727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71732364360 + 71732364361.

It is an arithmetic number, because the mean of its divisors is an integer number (71732364361).

Almost surely, 2^143464728721 is an apocalyptic number.

It is an amenable number.

143464728721 is a deficient number, since it is larger than the sum of its proper divisors (1).

143464728721 is an equidigital number, since it uses as much as digits as its factorization.

143464728721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 49.

The spelling of 143464728721 in words is "one hundred forty-three billion, four hundred sixty-four million, seven hundred twenty-eight thousand, seven hundred twenty-one".