30890087 has 2 divisors, whose sum is σ = 30890088. Its totient is φ = 30890086.

The previous prime is 30890063. The next prime is 30890089. The reversal of 30890087 is 78009803.

It is a strong prime.

It is an emirp because it is prime and its reverse (78009803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30890087 - 2¹⁰ = 30889063 is a prime.

Together with 30890089, 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 (30890089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15445043 + 15445044.

It is an arithmetic number, because the mean of its divisors is an integer number (15445044).

Almost surely, 2^30890087 is an apocalyptic number.

30890087 is a deficient number, since it is larger than the sum of its proper divisors (1).

30890087 is an equidigital number, since it uses as much as digits as its factorization.

30890087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 30890087 is about 5557.8851193597. The cubic root of 30890087 is about 313.7663583054.

The spelling of 30890087 in words is "thirty million, eight hundred ninety thousand, eighty-seven".