30655897 has 2 divisors, whose sum is σ = 30655898. Its totient is φ = 30655896.

The previous prime is 30655853. The next prime is 30655901. The reversal of 30655897 is 79855603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 5294601 = 5036^2 + 2301^2 .

It is an emirp because it is prime and its reverse (79855603) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30655897 is a prime.

It is not a weakly prime, because it can be changed into another prime (30655817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15327948 + 15327949.

It is an arithmetic number, because the mean of its divisors is an integer number (15327949).

Almost surely, 2^30655897 is an apocalyptic number.

It is an amenable number.

30655897 is a deficient number, since it is larger than the sum of its proper divisors (1).

30655897 is an equidigital number, since it uses as much as digits as its factorization.

30655897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 30655897 is about 5536.7767699267. The cubic root of 30655897 is about 312.9714169205.

The spelling of 30655897 in words is "thirty million, six hundred fifty-five thousand, eight hundred ninety-seven".