30812197 has 8 divisors (see below), whose sum is σ = 33992280. Its totient is φ = 27747840.

The previous prime is 30812189. The next prime is 30812207. The reversal of 30812197 is 79121803.

It can be written as a sum of positive squares in 4 ways, for example, as 352836 + 30459361 = 594^2 + 5519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30812197 - 2³ = 30812189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30818197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28372 + ... + 29437.

It is an arithmetic number, because the mean of its divisors is an integer number (4249035).

Almost surely, 2^30812197 is an apocalyptic number.

It is an amenable number.

30812197 is a deficient number, since it is larger than the sum of its proper divisors (3180083).

30812197 is a wasteful number, since it uses less digits than its factorization.

30812197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57863.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 30812197 is about 5550.8735348592. The cubic root of 30812197 is about 313.5024135234.

The spelling of 30812197 in words is "thirty million, eight hundred twelve thousand, one hundred ninety-seven".