143123613306491 has 2 divisors, whose sum is σ = 143123613306492. Its totient is φ = 143123613306490.

The previous prime is 143123613306361. The next prime is 143123613306497. The reversal of 143123613306491 is 194603316321341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143123613306491 - 2²⁶ = 143123546197627 is a prime.

It is not a weakly prime, because it can be changed into another prime (143123613306497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71561806653245 + 71561806653246.

It is an arithmetic number, because the mean of its divisors is an integer number (71561806653246).

Almost surely, 2^{143123613306491} is an apocalyptic number.

143123613306491 is a deficient number, since it is larger than the sum of its proper divisors (1).

143123613306491 is an equidigital number, since it uses as much as digits as its factorization.

143123613306491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 47.

The spelling of 143123613306491 in words is "one hundred forty-three trillion, one hundred twenty-three billion, six hundred thirteen million, three hundred six thousand, four hundred ninety-one".