838279081 has 4 divisors (see below), whose sum is σ = 840526852. Its totient is φ = 836031312.

The previous prime is 838279063. The next prime is 838279103. The reversal of 838279081 is 180972838.

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 654541056 + 183738025 = 25584^2 + 13555^2 .

It is a cyclic number.

It is not a de Polignac number, because 838279081 - 2⁹ = 838278569 is a prime.

It is a super-2 number, since 2×838279081² = 1405423635284409122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838279381) 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, 1123326 + ... + 1124071.

It is an arithmetic number, because the mean of its divisors is an integer number (210131713).

Almost surely, 2^838279081 is an apocalyptic number.

It is an amenable number.

838279081 is a deficient number, since it is larger than the sum of its proper divisors (2247771).

838279081 is a wasteful number, since it uses less digits than its factorization.

838279081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247770.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 838279081 is about 28953.0495975813. The cubic root of 838279081 is about 942.8940087721.

The spelling of 838279081 in words is "eight hundred thirty-eight million, two hundred seventy-nine thousand, eighty-one".