30818197 has 2 divisors, whose sum is σ = 30818198. Its totient is φ = 30818196.

The previous prime is 30818173. The next prime is 30818233. The reversal of 30818197 is 79181803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17901361 + 12916836 = 4231^2 + 3594^2 .

It is a cyclic number.

It is not a de Polignac number, because 30818197 - 2¹⁵ = 30785429 is a prime.

It is a super-2 number, since 2×30818197² = 1899522532661618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30818167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15409098 + 15409099.

It is an arithmetic number, because the mean of its divisors is an integer number (15409099).

Almost surely, 2^30818197 is an apocalyptic number.

It is an amenable number.

30818197 is a deficient number, since it is larger than the sum of its proper divisors (1).

30818197 is an equidigital number, since it uses as much as digits as its factorization.

30818197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 30818197 is about 5551.4139640275. The cubic root of 30818197 is about 313.5227614438.

The spelling of 30818197 in words is "thirty million, eight hundred eighteen thousand, one hundred ninety-seven".