203123042413 has 2 divisors, whose sum is σ = 203123042414. Its totient is φ = 203123042412.

The previous prime is 203123042407. The next prime is 203123042449. The reversal of 203123042413 is 314240321302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137134680489 + 65988361924 = 370317^2 + 256882^2 .

It is a cyclic number.

It is not a de Polignac number, because 203123042413 - 2¹³ = 203123034221 is a prime.

It is a super-2 number, since 2×203123042413² (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 (203123042813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561521206 + 101561521207.

It is an arithmetic number, because the mean of its divisors is an integer number (101561521207).

Almost surely, 2^203123042413 is an apocalyptic number.

It is an amenable number.

203123042413 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123042413 is an equidigital number, since it uses as much as digits as its factorization.

203123042413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 203123042413 its reverse (314240321302), we get a palindrome (517363363715).

The spelling of 203123042413 in words is "two hundred three billion, one hundred twenty-three million, forty-two thousand, four hundred thirteen".