143944690861 has 2 divisors, whose sum is σ = 143944690862. Its totient is φ = 143944690860.

The previous prime is 143944690819. The next prime is 143944690871. The reversal of 143944690861 is 168096449341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143012548900 + 932141961 = 378170^2 + 30531^2 .

It is a cyclic number.

It is not a de Polignac number, because 143944690861 - 2¹⁷ = 143944559789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143944690871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71972345430 + 71972345431.

It is an arithmetic number, because the mean of its divisors is an integer number (71972345431).

Almost surely, 2^143944690861 is an apocalyptic number.

It is an amenable number.

143944690861 is a deficient number, since it is larger than the sum of its proper divisors (1).

143944690861 is an equidigital number, since it uses as much as digits as its factorization.

143944690861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 143944690861 in words is "one hundred forty-three billion, nine hundred forty-four million, six hundred ninety thousand, eight hundred sixty-one".