2138236453 has 2 divisors, whose sum is σ = 2138236454. Its totient is φ = 2138236452.

The previous prime is 2138236427. The next prime is 2138236487. The reversal of 2138236453 is 3546328312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2130930244 + 7306209 = 46162^2 + 2703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2138236453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138236403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069118226 + 1069118227.

It is an arithmetic number, because the mean of its divisors is an integer number (1069118227).

Almost surely, 2^2138236453 is an apocalyptic number.

It is an amenable number.

2138236453 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138236453 is an equidigital number, since it uses as much as digits as its factorization.

2138236453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 37.

The square root of 2138236453 is about 46241.0688998427. The cubic root of 2138236453 is about 1288.3046561212.

The spelling of 2138236453 in words is "two billion, one hundred thirty-eight million, two hundred thirty-six thousand, four hundred fifty-three".