30220397 has 2 divisors, whose sum is σ = 30220398. Its totient is φ = 30220396.

The previous prime is 30220387. The next prime is 30220429. The reversal of 30220397 is 79302203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20666116 + 9554281 = 4546^2 + 3091^2 .

It is an emirp because it is prime and its reverse (79302203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30220397 - 2¹⁰ = 30219373 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 (30220327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110198 + 15110199.

It is an arithmetic number, because the mean of its divisors is an integer number (15110199).

Almost surely, 2^30220397 is an apocalyptic number.

It is an amenable number.

30220397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30220397 is an equidigital number, since it uses as much as digits as its factorization.

30220397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 30220397 is about 5497.3081594540. The cubic root of 30220397 is about 311.4823111478.

The spelling of 30220397 in words is "thirty million, two hundred twenty thousand, three hundred ninety-seven".