30421933 has 2 divisors, whose sum is σ = 30421934. Its totient is φ = 30421932.

The previous prime is 30421921. The next prime is 30421949. The reversal of 30421933 is 33912403.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30008484 + 413449 = 5478^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 30421933 - 2⁵ = 30421901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30421898 and 30421907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30421133) 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 as a sum of consecutive naturals, namely, 15210966 + 15210967.

It is an arithmetic number, because the mean of its divisors is an integer number (15210967).

Almost surely, 2^30421933 is an apocalyptic number.

It is an amenable number.

30421933 is a deficient number, since it is larger than the sum of its proper divisors (1).

30421933 is an equidigital number, since it uses as much as digits as its factorization.

30421933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 30421933 is about 5515.6081260365. The cubic root of 30421933 is about 312.1731896498.

The spelling of 30421933 in words is "thirty million, four hundred twenty-one thousand, nine hundred thirty-three".