143031011993 has 2 divisors, whose sum is σ = 143031011994. Its totient is φ = 143031011992.

The previous prime is 143031011989. The next prime is 143031012017. The reversal of 143031011993 is 399110130341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136702491289 + 6328520704 = 369733^2 + 79552^2 .

It is a cyclic number.

It is not a de Polignac number, because 143031011993 - 2² = 143031011989 is a prime.

It is not a weakly prime, because it can be changed into another prime (143031011983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71515505996 + 71515505997.

It is an arithmetic number, because the mean of its divisors is an integer number (71515505997).

Almost surely, 2^143031011993 is an apocalyptic number.

It is an amenable number.

143031011993 is a deficient number, since it is larger than the sum of its proper divisors (1).

143031011993 is an equidigital number, since it uses as much as digits as its factorization.

143031011993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The spelling of 143031011993 in words is "one hundred forty-three billion, thirty-one million, eleven thousand, nine hundred ninety-three".