838671653 has 4 divisors (see below), whose sum is σ = 848095020. Its totient is φ = 829248288.

The previous prime is 838671623. The next prime is 838671661. The reversal of 838671653 is 356176838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 504586369 + 334085284 = 22463^2 + 18278^2 .

It is a cyclic number.

It is not a de Polignac number, because 838671653 - 2¹⁰ = 838670629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 838671598 and 838671607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838671623) 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 3 ways as a sum of consecutive naturals, for example, 4711550 + ... + 4711727.

It is an arithmetic number, because the mean of its divisors is an integer number (212023755).

Almost surely, 2^838671653 is an apocalyptic number.

It is an amenable number.

838671653 is a deficient number, since it is larger than the sum of its proper divisors (9423367).

838671653 is an equidigital number, since it uses as much as digits as its factorization.

838671653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423366.

The product of its digits is 725760, while the sum is 47.

The square root of 838671653 is about 28959.8282626123. The cubic root of 838671653 is about 943.0411737710.

The spelling of 838671653 in words is "eight hundred thirty-eight million, six hundred seventy-one thousand, six hundred fifty-three".