143660681 has 2 divisors, whose sum is σ = 143660682. Its totient is φ = 143660680.

The previous prime is 143660639. The next prime is 143660689. The reversal of 143660681 is 186066341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135932281 + 7728400 = 11659^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 143660681 - 2¹⁰ = 143659657 is a prime.

It is a super-2 number, since 2×143660681² = 41276782530767522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (143660689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71830340 + 71830341.

It is an arithmetic number, because the mean of its divisors is an integer number (71830341).

Almost surely, 2^143660681 is an apocalyptic number.

It is an amenable number.

143660681 is a deficient number, since it is larger than the sum of its proper divisors (1).

143660681 is an equidigital number, since it uses as much as digits as its factorization.

143660681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 143660681 is about 11985.8533697021. The cubic root of 143660681 is about 523.7362571985.

The spelling of 143660681 in words is "one hundred forty-three million, six hundred sixty thousand, six hundred eighty-one".