30666239 has 2 divisors, whose sum is σ = 30666240. Its totient is φ = 30666238.

The previous prime is 30666227. The next prime is 30666241. The reversal of 30666239 is 93266603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30666239 - 2²⁰ = 29617663 is a prime.

Together with 30666241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30666199 and 30666208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30666539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15333119 + 15333120.

It is an arithmetic number, because the mean of its divisors is an integer number (15333120).

Almost surely, 2^30666239 is an apocalyptic number.

30666239 is a deficient number, since it is larger than the sum of its proper divisors (1).

30666239 is an equidigital number, since it uses as much as digits as its factorization.

30666239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 30666239 is about 5537.7106280484. The cubic root of 30666239 is about 313.0066073928.

The spelling of 30666239 in words is "thirty million, six hundred sixty-six thousand, two hundred thirty-nine".