838475356489 has 3 divisors (see below), whose sum is σ = 838476272173. Its totient is φ = 838474440806.

The previous prime is 838475356373. The next prime is 838475356493. The reversal of 838475356489 is 984653574838.

The square root of 838475356489 is 915683.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 984653574838 = 2 ⋅492326787419.

It is not a de Polignac number, because 838475356489 - 2¹³ = 838475348297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838475356289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 457842 + ... + 1373524.

Almost surely, 2^838475356489 is an apocalyptic number.

838475356489 is the 915683-rd square number.

838475356489 is the 457842-nd centered octagonal number.

It is an amenable number.

838475356489 is a deficient number, since it is larger than the sum of its proper divisors (915684).

838475356489 is an frugal number, since it uses more digits than its factorization.

838475356489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831366 (or 915683 counting only the distinct ones).

The product of its digits is 696729600, while the sum is 70.

The spelling of 838475356489 in words is "eight hundred thirty-eight billion, four hundred seventy-five million, three hundred fifty-six thousand, four hundred eighty-nine".