203140344409 has 2 divisors, whose sum is σ = 203140344410. Its totient is φ = 203140344408.

The previous prime is 203140344397. The next prime is 203140344479. The reversal of 203140344409 is 904443041302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174768310809 + 28372033600 = 418053^2 + 168440^2 .

It is a cyclic number.

It is not a de Polignac number, because 203140344409 - 2¹⁷ = 203140213337 is a prime.

It is not a weakly prime, because it can be changed into another prime (203140344479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101570172204 + 101570172205.

It is an arithmetic number, because the mean of its divisors is an integer number (101570172205).

Almost surely, 2^203140344409 is an apocalyptic number.

It is an amenable number.

203140344409 is a deficient number, since it is larger than the sum of its proper divisors (1).

203140344409 is an equidigital number, since it uses as much as digits as its factorization.

203140344409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 203140344409 in words is "two hundred three billion, one hundred forty million, three hundred forty-four thousand, four hundred nine".