308705969 has 24 divisors (see below), whose sum is σ = 367447080. Its totient is φ = 257621760.

The previous prime is 308705959. The next prime is 308705983. The reversal of 308705969 is 969507803.

It can be written as a sum of positive squares in 4 ways, for example, as 132135025 + 176570944 = 11495^2 + 13288^2 .

It is a de Polignac number, because none of the positive numbers 2^k-308705969 is a prime.

It is a super-2 number, since 2×308705969² = 190598750592457922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (308705959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359789 + ... + 360645.

It is an arithmetic number, because the mean of its divisors is an integer number (15310295).

Almost surely, 2^308705969 is an apocalyptic number.

It is an amenable number.

308705969 is a deficient number, since it is larger than the sum of its proper divisors (58741111).

308705969 is a wasteful number, since it uses less digits than its factorization.

308705969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 308705969 is about 17570.0304211461. The cubic root of 308705969 is about 675.8469252096.

The spelling of 308705969 in words is "three hundred eight million, seven hundred five thousand, nine hundred sixty-nine".