838313149 has 2 divisors, whose sum is σ = 838313150. Its totient is φ = 838313148.

The previous prime is 838313111. The next prime is 838313153. The reversal of 838313149 is 941313838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622752025 + 215561124 = 24955^2 + 14682^2 .

It is a cyclic number.

It is not a de Polignac number, because 838313149 - 2²¹ = 836215997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838313159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419156574 + 419156575.

It is an arithmetic number, because the mean of its divisors is an integer number (419156575).

Almost surely, 2^838313149 is an apocalyptic number.

It is an amenable number.

838313149 is a deficient number, since it is larger than the sum of its proper divisors (1).

838313149 is an equidigital number, since it uses as much as digits as its factorization.

838313149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 838313149 is about 28953.6379234113. The cubic root of 838313149 is about 942.9067817967.

The spelling of 838313149 in words is "eight hundred thirty-eight million, three hundred thirteen thousand, one hundred forty-nine".