308242969 has 2 divisors, whose sum is σ = 308242970. Its totient is φ = 308242968.

The previous prime is 308242939. The next prime is 308243051. The reversal of 308242969 is 969242803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180552969 + 127690000 = 13437^2 + 11300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308242969 is a prime.

It is a super-2 number, since 2×308242969² = 190027455875869922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (308242939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154121484 + 154121485.

It is an arithmetic number, because the mean of its divisors is an integer number (154121485).

Almost surely, 2^308242969 is an apocalyptic number.

It is an amenable number.

308242969 is a deficient number, since it is larger than the sum of its proper divisors (1).

308242969 is an equidigital number, since it uses as much as digits as its factorization.

308242969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 308242969 is about 17556.8496319812. The cubic root of 308242969 is about 675.5088757095.

The spelling of 308242969 in words is "three hundred eight million, two hundred forty-two thousand, nine hundred sixty-nine".