838217057 has 2 divisors, whose sum is σ = 838217058. Its totient is φ = 838217056.

The previous prime is 838217047. The next prime is 838217059. The reversal of 838217057 is 750712838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665846416 + 172370641 = 25804^2 + 13129^2 .

It is a cyclic number.

It is not a de Polignac number, because 838217057 - 2¹² = 838212961 is a prime.

Together with 838217059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (838217059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419108528 + 419108529.

It is an arithmetic number, because the mean of its divisors is an integer number (419108529).

Almost surely, 2^838217057 is an apocalyptic number.

It is an amenable number.

838217057 is a deficient number, since it is larger than the sum of its proper divisors (1).

838217057 is an equidigital number, since it uses as much as digits as its factorization.

838217057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 838217057 is about 28951.9784643468. The cubic root of 838217057 is about 942.8707533903.

The spelling of 838217057 in words is "eight hundred thirty-eight million, two hundred seventeen thousand, fifty-seven".