30820853 has 6 divisors (see below), whose sum is σ = 35852886. Its totient is φ = 26417832.

The previous prime is 30820849. The next prime is 30820879. The reversal of 30820853 is 35802803.

It can be written as a sum of positive squares in only one way, i.e., 28976689 + 1844164 = 5383^2 + 1358^2 .

It is not a de Polignac number, because 30820853 - 2² = 30820849 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 (30820883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 314450 + ... + 314547.

It is an arithmetic number, because the mean of its divisors is an integer number (5975481).

Almost surely, 2^30820853 is an apocalyptic number.

It is an amenable number.

30820853 is a deficient number, since it is larger than the sum of its proper divisors (5032033).

30820853 is an equidigital number, since it uses as much as digits as its factorization.

30820853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629011 (or 629004 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 30820853 is about 5551.6531772077. The cubic root of 30820853 is about 313.5317679466.

The spelling of 30820853 in words is "thirty million, eight hundred twenty thousand, eight hundred fifty-three".