203001311993 has 2 divisors, whose sum is σ = 203001311994. Its totient is φ = 203001311992.

The previous prime is 203001311987. The next prime is 203001312011. The reversal of 203001311993 is 399113100302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119403420304 + 83597891689 = 345548^2 + 289133^2 .

It is a cyclic number.

It is not a de Polignac number, because 203001311993 - 2¹⁶ = 203001246457 is a prime.

It is not a weakly prime, because it can be changed into another prime (203001311593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101500655996 + 101500655997.

It is an arithmetic number, because the mean of its divisors is an integer number (101500655997).

Almost surely, 2^203001311993 is an apocalyptic number.

It is an amenable number.

203001311993 is a deficient number, since it is larger than the sum of its proper divisors (1).

203001311993 is an equidigital number, since it uses as much as digits as its factorization.

203001311993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 32.

The spelling of 203001311993 in words is "two hundred three billion, one million, three hundred eleven thousand, nine hundred ninety-three".