309296997 has 12 divisors (see below), whose sum is σ = 473042700. Its totient is φ = 194068608.

The previous prime is 309296993. The next prime is 309297041. The reversal of 309296997 is 799692903.

It can be written as a sum of positive squares in 2 ways, for example, as 262634436 + 46662561 = 16206^2 + 6831^2 .

It is not a de Polignac number, because 309296997 - 2² = 309296993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309296993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1010622 + ... + 1010927.

It is an arithmetic number, because the mean of its divisors is an integer number (39420225).

Almost surely, 2^309296997 is an apocalyptic number.

It is an amenable number.

309296997 is a deficient number, since it is larger than the sum of its proper divisors (163745703).

309296997 is a wasteful number, since it uses less digits than its factorization.

309296997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021572 (or 2021569 counting only the distinct ones).

The product of its (nonzero) digits is 1653372, while the sum is 54.

The square root of 309296997 is about 17586.8415868228. The cubic root of 309296997 is about 676.2779608344.

The spelling of 309296997 in words is "three hundred nine million, two hundred ninety-six thousand, nine hundred ninety-seven".