30904397 has 2 divisors, whose sum is σ = 30904398. Its totient is φ = 30904396.

The previous prime is 30904337. The next prime is 30904409. The reversal of 30904397 is 79340903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30096196 + 808201 = 5486^2 + 899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30904397 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 (30904327) 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, 15452198 + 15452199.

It is an arithmetic number, because the mean of its divisors is an integer number (15452199).

Almost surely, 2^30904397 is an apocalyptic number.

It is an amenable number.

30904397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30904397 is an equidigital number, since it uses as much as digits as its factorization.

30904397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30904397 is about 5559.1723304823. The cubic root of 30904397 is about 313.8148021468.

The spelling of 30904397 in words is "thirty million, nine hundred four thousand, three hundred ninety-seven".