30863897 has 2 divisors, whose sum is σ = 30863898. Its totient is φ = 30863896.

The previous prime is 30863867. The next prime is 30863909. The reversal of 30863897 is 79836803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22477081 + 8386816 = 4741^2 + 2896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30863897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30863837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15431948 + 15431949.

It is an arithmetic number, because the mean of its divisors is an integer number (15431949).

Almost surely, 2^30863897 is an apocalyptic number.

It is an amenable number.

30863897 is a deficient number, since it is larger than the sum of its proper divisors (1).

30863897 is an equidigital number, since it uses as much as digits as its factorization.

30863897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 30863897 is about 5555.5285077119. The cubic root of 30863897 is about 313.6776581730.

The spelling of 30863897 in words is "thirty million, eight hundred sixty-three thousand, eight hundred ninety-seven".