30861841 has 2 divisors, whose sum is σ = 30861842. Its totient is φ = 30861840.

The previous prime is 30861839. The next prime is 30861869. The reversal of 30861841 is 14816803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28890625 + 1971216 = 5375^2 + 1404^2 .

It is a cyclic number.

It is not a de Polignac number, because 30861841 - 2¹ = 30861839 is a prime.

Together with 30861839, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30861821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15430920 + 15430921.

It is an arithmetic number, because the mean of its divisors is an integer number (15430921).

Almost surely, 2^30861841 is an apocalyptic number.

It is an amenable number.

30861841 is a deficient number, since it is larger than the sum of its proper divisors (1).

30861841 is an equidigital number, since it uses as much as digits as its factorization.

30861841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 30861841 is about 5555.3434637293. The cubic root of 30861841 is about 313.6706928009.

The spelling of 30861841 in words is "thirty million, eight hundred sixty-one thousand, eight hundred forty-one".