838197853 has 2 divisors, whose sum is σ = 838197854. Its totient is φ = 838197852.

The previous prime is 838197799. The next prime is 838197887. The reversal of 838197853 is 358791838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444492889 + 393704964 = 21083^2 + 19842^2 .

It is a cyclic number.

It is not a de Polignac number, because 838197853 - 2⁹ = 838197341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 838197853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838197253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419098926 + 419098927.

It is an arithmetic number, because the mean of its divisors is an integer number (419098927).

Almost surely, 2^838197853 is an apocalyptic number.

It is an amenable number.

838197853 is a deficient number, since it is larger than the sum of its proper divisors (1).

838197853 is an equidigital number, since it uses as much as digits as its factorization.

838197853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 52.

The square root of 838197853 is about 28951.6468098103. The cubic root of 838197853 is about 942.8635527779.

The spelling of 838197853 in words is "eight hundred thirty-eight million, one hundred ninety-seven thousand, eight hundred fifty-three".