30853409 has 2 divisors, whose sum is σ = 30853410. Its totient is φ = 30853408.

The previous prime is 30853393. The next prime is 30853411. The reversal of 30853409 is 90435803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18037009 + 12816400 = 4247^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 30853409 - 2⁴ = 30853393 is a prime.

It is a Sophie Germain prime.

Together with 30853411, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30853429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15426704 + 15426705.

It is an arithmetic number, because the mean of its divisors is an integer number (15426705).

Almost surely, 2^30853409 is an apocalyptic number.

It is an amenable number.

30853409 is a deficient number, since it is larger than the sum of its proper divisors (1).

30853409 is an equidigital number, since it uses as much as digits as its factorization.

30853409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 30853409 is about 5554.5845029129. The cubic root of 30853409 is about 313.6421234079.

The spelling of 30853409 in words is "thirty million, eight hundred fifty-three thousand, four hundred nine".