30498421 has 2 divisors, whose sum is σ = 30498422. Its totient is φ = 30498420.

The previous prime is 30498379. The next prime is 30498427. The reversal of 30498421 is 12489403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28836900 + 1661521 = 5370^2 + 1289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30498421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30498427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15249210 + 15249211.

It is an arithmetic number, because the mean of its divisors is an integer number (15249211).

Almost surely, 2^30498421 is an apocalyptic number.

It is an amenable number.

30498421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30498421 is an equidigital number, since it uses as much as digits as its factorization.

30498421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 30498421 is about 5522.5375508004. The cubic root of 30498421 is about 312.4345966593.

The spelling of 30498421 in words is "thirty million, four hundred ninety-eight thousand, four hundred twenty-one".