30665137 has 2 divisors, whose sum is σ = 30665138. Its totient is φ = 30665136.

The previous prime is 30665077. The next prime is 30665143. The reversal of 30665137 is 73156603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21123216 + 9541921 = 4596^2 + 3089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30665137 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30665099 and 30665108.

It is not a weakly prime, because it can be changed into another prime (30665147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15332568 + 15332569.

It is an arithmetic number, because the mean of its divisors is an integer number (15332569).

Almost surely, 2^30665137 is an apocalyptic number.

It is an amenable number.

30665137 is a deficient number, since it is larger than the sum of its proper divisors (1).

30665137 is an equidigital number, since it uses as much as digits as its factorization.

30665137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 30665137 is about 5537.6111275531. The cubic root of 30665137 is about 313.0028580208.

The spelling of 30665137 in words is "thirty million, six hundred sixty-five thousand, one hundred thirty-seven".