2003431109 has 2 divisors, whose sum is σ = 2003431110. Its totient is φ = 2003431108.

The previous prime is 2003431091. The next prime is 2003431151. The reversal of 2003431109 is 9011343002.

Together with previous prime (2003431091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1997196100 + 6235009 = 44690^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003431109 - 2⁸ = 2003430853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003431159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001715554 + 1001715555.

It is an arithmetic number, because the mean of its divisors is an integer number (1001715555).

Almost surely, 2^2003431109 is an apocalyptic number.

It is an amenable number.

2003431109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003431109 is an equidigital number, since it uses as much as digits as its factorization.

2003431109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2003431109 is about 44759.7040763229. The cubic root of 2003431109 is about 1260.6411260174.

The spelling of 2003431109 in words is "two billion, three million, four hundred thirty-one thousand, one hundred nine".