143491917917 has 2 divisors, whose sum is σ = 143491917918. Its totient is φ = 143491917916.

The previous prime is 143491917859. The next prime is 143491917923. The reversal of 143491917917 is 719719194341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124024413241 + 19467504676 = 352171^2 + 139526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143491917917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143491917997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71745958958 + 71745958959.

It is an arithmetic number, because the mean of its divisors is an integer number (71745958959).

Almost surely, 2^143491917917 is an apocalyptic number.

It is an amenable number.

143491917917 is a deficient number, since it is larger than the sum of its proper divisors (1).

143491917917 is an equidigital number, since it uses as much as digits as its factorization.

143491917917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 56.

The spelling of 143491917917 in words is "one hundred forty-three billion, four hundred ninety-one million, nine hundred seventeen thousand, nine hundred seventeen".