30855887 has 2 divisors, whose sum is σ = 30855888. Its totient is φ = 30855886.

The previous prime is 30855863. The next prime is 30855889. The reversal of 30855887 is 78855803.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30855887 - 2⁶ = 30855823 is a prime.

Together with 30855889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30855889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15427943 + 15427944.

It is an arithmetic number, because the mean of its divisors is an integer number (15427944).

Almost surely, 2^30855887 is an apocalyptic number.

30855887 is a deficient number, since it is larger than the sum of its proper divisors (1).

30855887 is an equidigital number, since it uses as much as digits as its factorization.

30855887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 30855887 is about 5554.8075574227. The cubic root of 30855887 is about 313.6505199341.

The spelling of 30855887 in words is "thirty million, eight hundred fifty-five thousand, eight hundred eighty-seven".