203149419791 has 2 divisors, whose sum is σ = 203149419792. Its totient is φ = 203149419790.

The previous prime is 203149419769. The next prime is 203149419871. The reversal of 203149419791 is 197914941302.

203149419791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203149419791 - 2⁶ = 203149419727 is a prime.

It is a super-2 number, since 2×203149419791² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203149419761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101574709895 + 101574709896.

It is an arithmetic number, because the mean of its divisors is an integer number (101574709896).

Almost surely, 2^203149419791 is an apocalyptic number.

203149419791 is a deficient number, since it is larger than the sum of its proper divisors (1).

203149419791 is an equidigital number, since it uses as much as digits as its factorization.

203149419791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

Adding to 203149419791 its sum of digits (50), we get a square (203149419841 = 450721²).

The spelling of 203149419791 in words is "two hundred three billion, one hundred forty-nine million, four hundred nineteen thousand, seven hundred ninety-one".