308969 has 4 divisors (see below), whose sum is σ = 312960. Its totient is φ = 304980.

The previous prime is 308951. The next prime is 308989. The reversal of 308969 is 969803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 969803 = 139 ⋅6977.

It is a cyclic number.

It is not a de Polignac number, because 308969 - 2⁸ = 308713 is a prime.

It is a super-2 number, since 2×308969² = 190923685922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1877 + ... + 2034.

It is an arithmetic number, because the mean of its divisors is an integer number (78240).

2³⁰⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

308969 is a deficient number, since it is larger than the sum of its proper divisors (3991).

308969 is an equidigital number, since it uses as much as digits as its factorization.

308969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 308969 is about 555.8497998560. The cubic root of 308969 is about 67.6038821108.

The spelling of 308969 in words is "three hundred eight thousand, nine hundred sixty-nine".