30890851 has 2 divisors, whose sum is σ = 30890852. Its totient is φ = 30890850.

The previous prime is 30890843. The next prime is 30890861. The reversal of 30890851 is 15809803.

It is a weak prime.

It is an emirp because it is prime and its reverse (15809803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30890851 - 2³ = 30890843 is a prime.

It is not a weakly prime, because it can be changed into another prime (30890831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15445425 + 15445426.

It is an arithmetic number, because the mean of its divisors is an integer number (15445426).

Almost surely, 2^30890851 is an apocalyptic number.

30890851 is a deficient number, since it is larger than the sum of its proper divisors (1).

30890851 is an equidigital number, since it uses as much as digits as its factorization.

30890851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 30890851 is about 5557.9538501143. The cubic root of 30890851 is about 313.7689450632.

The spelling of 30890851 in words is "thirty million, eight hundred ninety thousand, eight hundred fifty-one".