30902969 has 2 divisors, whose sum is σ = 30902970. Its totient is φ = 30902968.

The previous prime is 30902947. The next prime is 30902981. The reversal of 30902969 is 96920903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30858025 + 44944 = 5555^2 + 212^2 .

It is an emirp because it is prime and its reverse (96920903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30902969 - 2⁸ = 30902713 is a prime.

It is a super-2 number, since 2×30902969² = 1909986986029922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30904969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15451484 + 15451485.

It is an arithmetic number, because the mean of its divisors is an integer number (15451485).

Almost surely, 2^30902969 is an apocalyptic number.

It is an amenable number.

30902969 is a deficient number, since it is larger than the sum of its proper divisors (1).

30902969 is an equidigital number, since it uses as much as digits as its factorization.

30902969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 30902969 is about 5559.0438926132. The cubic root of 30902969 is about 313.8099685904.

The spelling of 30902969 in words is "thirty million, nine hundred two thousand, nine hundred sixty-nine".