30706397 has 2 divisors, whose sum is σ = 30706398. Its totient is φ = 30706396.

The previous prime is 30706393. The next prime is 30706409. The reversal of 30706397 is 79360703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26977636 + 3728761 = 5194^2 + 1931^2 .

It is an emirp because it is prime and its reverse (79360703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30706397 - 2² = 30706393 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 (30706393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15353198 + 15353199.

It is an arithmetic number, because the mean of its divisors is an integer number (15353199).

Almost surely, 2^30706397 is an apocalyptic number.

It is an amenable number.

30706397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30706397 is an equidigital number, since it uses as much as digits as its factorization.

30706397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 35.

The square root of 30706397 is about 5541.3353083891. The cubic root of 30706397 is about 313.1431770862.

The spelling of 30706397 in words is "thirty million, seven hundred six thousand, three hundred ninety-seven".