2100042349 has 2 divisors, whose sum is σ = 2100042350. Its totient is φ = 2100042348.

The previous prime is 2100042341. The next prime is 2100042353. The reversal of 2100042349 is 9432400012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2082553225 + 17489124 = 45635^2 + 4182^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100042349 - 2³ = 2100042341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100042341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050021174 + 1050021175.

It is an arithmetic number, because the mean of its divisors is an integer number (1050021175).

Almost surely, 2^2100042349 is an apocalyptic number.

It is an amenable number.

2100042349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100042349 is an equidigital number, since it uses as much as digits as its factorization.

2100042349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2100042349 is about 45826.2190127006. The cubic root of 2100042349 is about 1280.5877730641.

The spelling of 2100042349 in words is "two billion, one hundred million, forty-two thousand, three hundred forty-nine".