30669409 has 2 divisors, whose sum is σ = 30669410. Its totient is φ = 30669408.

The previous prime is 30669403. The next prime is 30669421. The reversal of 30669409 is 90496603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26780625 + 3888784 = 5175^2 + 1972^2 .

It is an emirp because it is prime and its reverse (90496603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30669409 - 2¹¹ = 30667361 is a prime.

It is a super-2 number, since 2×30669409² = 1881225296818562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30669403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15334704 + 15334705.

It is an arithmetic number, because the mean of its divisors is an integer number (15334705).

Almost surely, 2^30669409 is an apocalyptic number.

It is an amenable number.

30669409 is a deficient number, since it is larger than the sum of its proper divisors (1).

30669409 is an equidigital number, since it uses as much as digits as its factorization.

30669409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 30669409 is about 5537.9968400135. The cubic root of 30669409 is about 313.0173922906.

The spelling of 30669409 in words is "thirty million, six hundred sixty-nine thousand, four hundred nine".