30690197 has 4 divisors (see below), whose sum is σ = 30740556. Its totient is φ = 30639840.

The previous prime is 30690167. The next prime is 30690199. The reversal of 30690197 is 79109603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79109603 = 2137 ⋅37019.

It can be written as a sum of positive squares in 2 ways, for example, as 13830961 + 16859236 = 3719^2 + 4106^2 .

It is a cyclic number.

It is not a de Polignac number, because 30690197 - 2¹² = 30686101 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 (30690199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24254 + ... + 25487.

It is an arithmetic number, because the mean of its divisors is an integer number (7685139).

Almost surely, 2^30690197 is an apocalyptic number.

It is an amenable number.

30690197 is a deficient number, since it is larger than the sum of its proper divisors (50359).

30690197 is an equidigital number, since it uses as much as digits as its factorization.

30690197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50358.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 30690197 is about 5539.8733740041. The cubic root of 30690197 is about 313.0880983149.

The spelling of 30690197 in words is "thirty million, six hundred ninety thousand, one hundred ninety-seven".