821138035 has 4 divisors (see below), whose sum is σ = 985365648. Its totient is φ = 656910424.

The previous prime is 821138027. The next prime is 821138041. The reversal of 821138035 is 530831128.

821138035 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 821138035 - 2³ = 821138027 is a prime.

It is a super-2 number, since 2×821138035² = 1348535345047322450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 821137988 and 821138006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82113799 + ... + 82113808.

It is an arithmetic number, because the mean of its divisors is an integer number (246341412).

Almost surely, 2^821138035 is an apocalyptic number.

821138035 is a deficient number, since it is larger than the sum of its proper divisors (164227613).

821138035 is a wasteful number, since it uses less digits than its factorization.

821138035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164227612.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 821138035 is about 28655.5061899105. The cubic root of 821138035 is about 936.4229660419.

The spelling of 821138035 in words is "eight hundred twenty-one million, one hundred thirty-eight thousand, thirty-five".