30868621 has 4 divisors (see below), whose sum is σ = 35278432. Its totient is φ = 26458812.

The previous prime is 30868589. The next prime is 30868627. The reversal of 30868621 is 12686803.

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: 12686803 = 227 ⋅55889.

It is a cyclic number.

It is not a de Polignac number, because 30868621 - 2⁵ = 30868589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30868627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2204895 + ... + 2204908.

It is an arithmetic number, because the mean of its divisors is an integer number (8819608).

Almost surely, 2^30868621 is an apocalyptic number.

It is an amenable number.

30868621 is a deficient number, since it is larger than the sum of its proper divisors (4409811).

30868621 is an equidigital number, since it uses as much as digits as its factorization.

30868621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409810.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 30868621 is about 5555.9536535144. The cubic root of 30868621 is about 313.6936610956.

The spelling of 30868621 in words is "thirty million, eight hundred sixty-eight thousand, six hundred twenty-one".