30539969 has 2 divisors, whose sum is σ = 30539970. Its totient is φ = 30539968.

The previous prime is 30539963. The next prime is 30539981. The reversal of 30539969 is 96993503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26884225 + 3655744 = 5185^2 + 1912^2 .

It is an emirp because it is prime and its reverse (96993503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30539969 - 2⁴ = 30539953 is a prime.

It is a super-2 number, since 2×30539969² = 1865379413041922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30539963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15269984 + 15269985.

It is an arithmetic number, because the mean of its divisors is an integer number (15269985).

Almost surely, 2^30539969 is an apocalyptic number.

It is an amenable number.

30539969 is a deficient number, since it is larger than the sum of its proper divisors (1).

30539969 is an equidigital number, since it uses as much as digits as its factorization.

30539969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 44.

The square root of 30539969 is about 5526.2979470890. The cubic root of 30539969 is about 312.5764088359.

The spelling of 30539969 in words is "thirty million, five hundred thirty-nine thousand, nine hundred sixty-nine".