838562513 has 2 divisors, whose sum is σ = 838562514. Its totient is φ = 838562512.

The previous prime is 838562507. The next prime is 838562533. The reversal of 838562513 is 315265838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426959569 + 411602944 = 20663^2 + 20288^2 .

It is a cyclic number.

It is not a de Polignac number, because 838562513 - 2²² = 834368209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (838562533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419281256 + 419281257.

It is an arithmetic number, because the mean of its divisors is an integer number (419281257).

Almost surely, 2^838562513 is an apocalyptic number.

It is an amenable number.

838562513 is a deficient number, since it is larger than the sum of its proper divisors (1).

838562513 is an equidigital number, since it uses as much as digits as its factorization.

838562513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 41.

The square root of 838562513 is about 28957.9438669254. The cubic root of 838562513 is about 943.0002646427. Note that the first 3 decimals are identical.

The spelling of 838562513 in words is "eight hundred thirty-eight million, five hundred sixty-two thousand, five hundred thirteen".