838378435973 has 4 divisors (see below), whose sum is σ = 902869084908. Its totient is φ = 773887787040.

The previous prime is 838378435969. The next prime is 838378436029. The reversal of 838378435973 is 379534873838.

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 366791330689 + 471587105284 = 605633^2 + 686722^2 .

It is a cyclic number.

It is not a de Polignac number, because 838378435973 - 2² = 838378435969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838378435943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32245324448 + ... + 32245324473.

It is an arithmetic number, because the mean of its divisors is an integer number (225717271227).

Almost surely, 2^838378435973 is an apocalyptic number.

It is an amenable number.

838378435973 is a deficient number, since it is larger than the sum of its proper divisors (64490648935).

838378435973 is a wasteful number, since it uses less digits than its factorization.

838378435973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64490648934.

The product of its digits is 365783040, while the sum is 68.

The spelling of 838378435973 in words is "eight hundred thirty-eight billion, three hundred seventy-eight million, four hundred thirty-five thousand, nine hundred seventy-three".