30405797 has 2 divisors, whose sum is σ = 30405798. Its totient is φ = 30405796.

The previous prime is 30405787. The next prime is 30405901. The reversal of 30405797 is 79750403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30129121 + 276676 = 5489^2 + 526^2 .

It is an emirp because it is prime and its reverse (79750403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30405797 - 2¹⁸ = 30143653 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 (30405787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15202898 + 15202899.

It is an arithmetic number, because the mean of its divisors is an integer number (15202899).

Almost surely, 2^30405797 is an apocalyptic number.

It is an amenable number.

30405797 is a deficient number, since it is larger than the sum of its proper divisors (1).

30405797 is an equidigital number, since it uses as much as digits as its factorization.

30405797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 30405797 is about 5514.1451740048. The cubic root of 30405797 is about 312.1179869616.

The spelling of 30405797 in words is "thirty million, four hundred five thousand, seven hundred ninety-seven".