30969509 has 2 divisors, whose sum is σ = 30969510. Its totient is φ = 30969508.

The previous prime is 30969493. The next prime is 30969551. The reversal of 30969509 is 90596903.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17850625 + 13118884 = 4225^2 + 3622^2 .

It is an emirp because it is prime and its reverse (90596903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30969509 - 2⁴ = 30969493 is a prime.

It is a super-2 number, since 2×30969509² = 1918220975402162, 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 (30969559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15484754 + 15484755.

It is an arithmetic number, because the mean of its divisors is an integer number (15484755).

Almost surely, 2^30969509 is an apocalyptic number.

It is an amenable number.

30969509 is a deficient number, since it is larger than the sum of its proper divisors (1).

30969509 is an equidigital number, since it uses as much as digits as its factorization.

30969509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 30969509 is about 5565.0255165632. The cubic root of 30969509 is about 314.0350380796.

The spelling of 30969509 in words is "thirty million, nine hundred sixty-nine thousand, five hundred nine".