30205397 has 4 divisors (see below), whose sum is σ = 30942156. Its totient is φ = 29468640.

The previous prime is 30205381. The next prime is 30205403. The reversal of 30205397 is 79350203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5692996 + 24512401 = 2386^2 + 4951^2 .

It is a cyclic number.

It is not a de Polignac number, because 30205397 - 2⁴ = 30205381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30205337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368318 + ... + 368399.

It is an arithmetic number, because the mean of its divisors is an integer number (7735539).

Almost surely, 2^30205397 is an apocalyptic number.

It is an amenable number.

30205397 is a deficient number, since it is larger than the sum of its proper divisors (736759).

30205397 is an equidigital number, since it uses as much as digits as its factorization.

30205397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736758.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 30205397 is about 5495.9436860288. The cubic root of 30205397 is about 311.4307675065.

The spelling of 30205397 in words is "thirty million, two hundred five thousand, three hundred ninety-seven".