30408397 has 2 divisors, whose sum is σ = 30408398. Its totient is φ = 30408396.

The previous prime is 30408337. The next prime is 30408401. The reversal of 30408397 is 79380403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29909961 + 498436 = 5469^2 + 706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30408397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30408337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15204198 + 15204199.

It is an arithmetic number, because the mean of its divisors is an integer number (15204199).

Almost surely, 2^30408397 is an apocalyptic number.

It is an amenable number.

30408397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30408397 is an equidigital number, since it uses as much as digits as its factorization.

30408397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 30408397 is about 5514.3809262691. The cubic root of 30408397 is about 312.1268831121.

The spelling of 30408397 in words is "thirty million, four hundred eight thousand, three hundred ninety-seven".