143311201997 has 2 divisors, whose sum is σ = 143311201998. Its totient is φ = 143311201996.

The previous prime is 143311201991. The next prime is 143311202051. The reversal of 143311201997 is 799102113341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142864344676 + 446857321 = 377974^2 + 21139^2 .

It is a cyclic number.

It is not a de Polignac number, because 143311201997 - 2³⁶ = 74591725261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143311201991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71655600998 + 71655600999.

It is an arithmetic number, because the mean of its divisors is an integer number (71655600999).

Almost surely, 2^143311201997 is an apocalyptic number.

It is an amenable number.

143311201997 is a deficient number, since it is larger than the sum of its proper divisors (1).

143311201997 is an equidigital number, since it uses as much as digits as its factorization.

143311201997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 143311201997 in words is "one hundred forty-three billion, three hundred eleven million, two hundred one thousand, nine hundred ninety-seven".