30403421 has 2 divisors, whose sum is σ = 30403422. Its totient is φ = 30403420.

The previous prime is 30403409. The next prime is 30403453. The reversal of 30403421 is 12430403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29311396 + 1092025 = 5414^2 + 1045^2 .

It is an emirp because it is prime and its reverse (12430403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30403421 - 2¹⁰ = 30402397 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30403421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30403621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15201710 + 15201711.

It is an arithmetic number, because the mean of its divisors is an integer number (15201711).

Almost surely, 2^30403421 is an apocalyptic number.

It is an amenable number.

30403421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30403421 is an equidigital number, since it uses as much as digits as its factorization.

30403421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30403421 is about 5513.9297238902. The cubic root of 30403421 is about 312.1098568052.

Adding to 30403421 its reverse (12430403), we get a palindrome (42833824).

The spelling of 30403421 in words is "thirty million, four hundred three thousand, four hundred twenty-one".