308997 has 24 divisors (see below), whose sum is σ = 509600. Its totient is φ = 178848.

The previous prime is 308989. The next prime is 308999. The reversal of 308997 is 799803.

It is not a de Polignac number, because 308997 - 2³ = 308989 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308997.

It is not an unprimeable number, because it can be changed into a prime (308999) 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, 2154 + ... + 2292.

2³⁰⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

308997 is a deficient number, since it is larger than the sum of its proper divisors (200603).

308997 is a wasteful number, since it uses less digits than its factorization.

308997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 308997 is about 555.8749859456. The cubic root of 308997 is about 67.6059242267.

The spelling of 308997 in words is "three hundred eight thousand, nine hundred ninety-seven".