30868421 has 4 divisors (see below), whose sum is σ = 30885600. Its totient is φ = 30851244.

The previous prime is 30868417. The next prime is 30868423. The reversal of 30868421 is 12486803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12486803 = 7 ⋅1783829.

It is a cyclic number.

It is not a de Polignac number, because 30868421 - 2² = 30868417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30868423) 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 in 3 ways as a sum of consecutive naturals, for example, 5531 + ... + 9608.

It is an arithmetic number, because the mean of its divisors is an integer number (7721400).

Almost surely, 2^30868421 is an apocalyptic number.

It is an amenable number.

30868421 is a deficient number, since it is larger than the sum of its proper divisors (17179).

30868421 is a wasteful number, since it uses less digits than its factorization.

30868421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17178.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 30868421 is about 5555.9356547750. The cubic root of 30868421 is about 313.6929836129.

The spelling of 30868421 in words is "thirty million, eight hundred sixty-eight thousand, four hundred twenty-one".