30668137 has 2 divisors, whose sum is σ = 30668138. Its totient is φ = 30668136.

The previous prime is 30668129. The next prime is 30668161. The reversal of 30668137 is 73186603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30591961 + 76176 = 5531^2 + 276^2 .

It is a cyclic number.

It is not a de Polignac number, because 30668137 - 2³ = 30668129 is a prime.

It is a super-3 number, since 3×30668137³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (30668107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15334068 + 15334069.

It is an arithmetic number, because the mean of its divisors is an integer number (15334069).

Almost surely, 2^30668137 is an apocalyptic number.

It is an amenable number.

30668137 is a deficient number, since it is larger than the sum of its proper divisors (1).

30668137 is an equidigital number, since it uses as much as digits as its factorization.

30668137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 30668137 is about 5537.8819958536. The cubic root of 30668137 is about 313.0130648121.

The spelling of 30668137 in words is "thirty million, six hundred sixty-eight thousand, one hundred thirty-seven".