338138453 has 2 divisors, whose sum is σ = 338138454. Its totient is φ = 338138452.

The previous prime is 338138441. The next prime is 338138461. The reversal of 338138453 is 354831833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288252484 + 49885969 = 16978^2 + 7063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338138453 is a prime.

It is a super-2 number, since 2×338138453² = 228675226794466418, which contains 22 as substring.

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 (338138473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169069226 + 169069227.

It is an arithmetic number, because the mean of its divisors is an integer number (169069227).

Almost surely, 2^338138453 is an apocalyptic number.

It is an amenable number.

338138453 is a deficient number, since it is larger than the sum of its proper divisors (1).

338138453 is an equidigital number, since it uses as much as digits as its factorization.

338138453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 338138453 is about 18388.5413505259. The cubic root of 338138453 is about 696.6770760968.

The spelling of 338138453 in words is "three hundred thirty-eight million, one hundred thirty-eight thousand, four hundred fifty-three".