838216969 has 2 divisors, whose sum is σ = 838216970. Its totient is φ = 838216968.

The previous prime is 838216963. The next prime is 838217021. The reversal of 838216969 is 969612838.

It is a happy number.

838216969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (838217021) can be obtained adding 838216969 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515834944 + 322382025 = 22712^2 + 17955^2 .

It is a cyclic number.

It is not a de Polignac number, because 838216969 - 2³ = 838216961 is a prime.

It is a super-2 number, since 2×838216969² = 1405215374239093922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (838216961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419108484 + 419108485.

It is an arithmetic number, because the mean of its divisors is an integer number (419108485).

Almost surely, 2^838216969 is an apocalyptic number.

It is an amenable number.

838216969 is a deficient number, since it is larger than the sum of its proper divisors (1).

838216969 is an equidigital number, since it uses as much as digits as its factorization.

838216969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 838216969 is about 28951.9769445888. The cubic root of 838216969 is about 942.8707203946.

The spelling of 838216969 in words is "eight hundred thirty-eight million, two hundred sixteen thousand, nine hundred sixty-nine".