30864839 has 2 divisors, whose sum is σ = 30864840. Its totient is φ = 30864838.

The previous prime is 30864833. The next prime is 30864881. The reversal of 30864839 is 93846803.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30864839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30864796 and 30864805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30864833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15432419 + 15432420.

It is an arithmetic number, because the mean of its divisors is an integer number (15432420).

Almost surely, 2^30864839 is an apocalyptic number.

30864839 is a deficient number, since it is larger than the sum of its proper divisors (1).

30864839 is an equidigital number, since it uses as much as digits as its factorization.

30864839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 30864839 is about 5555.6132874778. The cubic root of 30864839 is about 313.6808494027.

The spelling of 30864839 in words is "thirty million, eight hundred sixty-four thousand, eight hundred thirty-nine".