30475397 has 2 divisors, whose sum is σ = 30475398. Its totient is φ = 30475396.

The previous prime is 30475369. The next prime is 30475399. The reversal of 30475397 is 79357403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17522596 + 12952801 = 4186^2 + 3599^2 .

It is a cyclic number.

It is not a de Polignac number, because 30475397 - 2¹⁰ = 30474373 is a prime.

Together with 30475399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30475397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30475399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15237698 + 15237699.

It is an arithmetic number, because the mean of its divisors is an integer number (15237699).

Almost surely, 2^30475397 is an apocalyptic number.

It is an amenable number.

30475397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30475397 is an equidigital number, since it uses as much as digits as its factorization.

30475397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 30475397 is about 5520.4526082560. The cubic root of 30475397 is about 312.3559553739.

The spelling of 30475397 in words is "thirty million, four hundred seventy-five thousand, three hundred ninety-seven".