30656669 has 2 divisors, whose sum is σ = 30656670. Its totient is φ = 30656668.

The previous prime is 30656663. The next prime is 30656693. The reversal of 30656669 is 96665603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 131044 = 5525^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 30656669 - 2⁴ = 30656653 is a prime.

It is a super-2 number, since 2×30656669² = 1879662708351122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30656663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15328334 + 15328335.

It is an arithmetic number, because the mean of its divisors is an integer number (15328335).

Almost surely, 2^30656669 is an apocalyptic number.

It is an amenable number.

30656669 is a deficient number, since it is larger than the sum of its proper divisors (1).

30656669 is an equidigital number, since it uses as much as digits as its factorization.

30656669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 30656669 is about 5536.8464851394. The cubic root of 30656669 is about 312.9740440595.

The spelling of 30656669 in words is "thirty million, six hundred fifty-six thousand, six hundred sixty-nine".