203434495549 has 2 divisors, whose sum is σ = 203434495550. Its totient is φ = 203434495548.

The previous prime is 203434495543. The next prime is 203434495567. The reversal of 203434495549 is 945594434302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105914448025 + 97520047524 = 325445^2 + 312282^2 .

It is a cyclic number.

It is not a de Polignac number, because 203434495549 - 2⁷ = 203434495421 is a prime.

It is a super-2 number, since 2×203434495549² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203434495496 and 203434495505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203434495543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101717247774 + 101717247775.

It is an arithmetic number, because the mean of its divisors is an integer number (101717247775).

Almost surely, 2^203434495549 is an apocalyptic number.

It is an amenable number.

203434495549 is a deficient number, since it is larger than the sum of its proper divisors (1).

203434495549 is an equidigital number, since it uses as much as digits as its factorization.

203434495549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 203434495549 in words is "two hundred three billion, four hundred thirty-four million, four hundred ninety-five thousand, five hundred forty-nine".