838453643 has 2 divisors, whose sum is σ = 838453644. Its totient is φ = 838453642.

The previous prime is 838453631. The next prime is 838453673. The reversal of 838453643 is 346354838.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 838453643 - 2¹⁸ = 838191499 is a prime.

It is a super-2 number, since 2×838453643² = 1406009022919942898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 838453594 and 838453603.

It is not a weakly prime, because it can be changed into another prime (838453613) 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, 419226821 + 419226822.

It is an arithmetic number, because the mean of its divisors is an integer number (419226822).

Almost surely, 2^838453643 is an apocalyptic number.

838453643 is a deficient number, since it is larger than the sum of its proper divisors (1).

838453643 is an equidigital number, since it uses as much as digits as its factorization.

838453643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 44.

The square root of 838453643 is about 28956.0640108424. The cubic root of 838453643 is about 942.9594531824.

The spelling of 838453643 in words is "eight hundred thirty-eight million, four hundred fifty-three thousand, six hundred forty-three".