838149293 has 2 divisors, whose sum is σ = 838149294. Its totient is φ = 838149292.

The previous prime is 838149251. The next prime is 838149331. The reversal of 838149293 is 392941838.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 757185289 + 80964004 = 27517^2 + 8998^2 .

It is a cyclic number.

It is not a de Polignac number, because 838149293 - 2²⁰ = 837100717 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838142293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419074646 + 419074647.

It is an arithmetic number, because the mean of its divisors is an integer number (419074647).

Almost surely, 2^838149293 is an apocalyptic number.

It is an amenable number.

838149293 is a deficient number, since it is larger than the sum of its proper divisors (1).

838149293 is an equidigital number, since it uses as much as digits as its factorization.

838149293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 838149293 is about 28950.8081579772. The cubic root of 838149293 is about 942.8453445318.

The spelling of 838149293 in words is "eight hundred thirty-eight million, one hundred forty-nine thousand, two hundred ninety-three".