143313661 has 2 divisors, whose sum is σ = 143313662. Its totient is φ = 143313660.

The previous prime is 143313641. The next prime is 143313671. The reversal of 143313661 is 166313341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143280900 + 32761 = 11970^2 + 181^2 .

It is an emirp because it is prime and its reverse (166313341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143313661 - 2⁵ = 143313629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143313641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71656830 + 71656831.

It is an arithmetic number, because the mean of its divisors is an integer number (71656831).

Almost surely, 2^143313661 is an apocalyptic number.

It is an amenable number.

143313661 is a deficient number, since it is larger than the sum of its proper divisors (1).

143313661 is an equidigital number, since it uses as much as digits as its factorization.

143313661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 143313661 is about 11971.3683846083. The cubic root of 143313661 is about 523.3142129499.

The spelling of 143313661 in words is "one hundred forty-three million, three hundred thirteen thousand, six hundred sixty-one".