838125557 has 4 divisors (see below), whose sum is σ = 838237260. Its totient is φ = 838013856.

The previous prime is 838125521. The next prime is 838125571. The reversal of 838125557 is 755521838.

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 40119556 + 798006001 = 6334^2 + 28249^2 .

It is a cyclic number.

It is not a de Polignac number, because 838125557 - 2²² = 833931253 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 (838125577) 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 in 3 ways as a sum of consecutive naturals, for example, 43718 + ... + 59895.

It is an arithmetic number, because the mean of its divisors is an integer number (209559315).

Almost surely, 2^838125557 is an apocalyptic number.

It is an amenable number.

838125557 is a deficient number, since it is larger than the sum of its proper divisors (111703).

838125557 is a wasteful number, since it uses less digits than its factorization.

838125557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111702.

The product of its digits is 336000, while the sum is 44.

The square root of 838125557 is about 28950.3982183320. The cubic root of 838125557 is about 942.8364441333.

The spelling of 838125557 in words is "eight hundred thirty-eight million, one hundred twenty-five thousand, five hundred fifty-seven".