30421693 has 2 divisors, whose sum is σ = 30421694. Its totient is φ = 30421692.

The previous prime is 30421691. The next prime is 30421723. The reversal of 30421693 is 39612403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25030009 + 5391684 = 5003^2 + 2322^2 .

It is a cyclic number.

It is not a de Polignac number, because 30421693 - 2¹ = 30421691 is a prime.

Together with 30421691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30421691) 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, 15210846 + 15210847.

It is an arithmetic number, because the mean of its divisors is an integer number (15210847).

Almost surely, 2^30421693 is an apocalyptic number.

It is an amenable number.

30421693 is a deficient number, since it is larger than the sum of its proper divisors (1).

30421693 is an equidigital number, since it uses as much as digits as its factorization.

30421693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 30421693 is about 5515.5863695531. The cubic root of 30421693 is about 312.1723687315.

The spelling of 30421693 in words is "thirty million, four hundred twenty-one thousand, six hundred ninety-three".