308919 has 12 divisors (see below), whose sum is σ = 448616. Its totient is φ = 187968.

The previous prime is 308899. The next prime is 308923. The reversal of 308919 is 919803.

It is a happy number.

It is not a de Polignac number, because 308919 - 2⁵ = 308887 is a prime.

It is a super-2 number, since 2×308919² = 190861897122, 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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3427 + ... + 3515.

2³⁰⁸⁹¹⁹ is an apocalyptic number.

308919 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

308919 is a deficient number, since it is larger than the sum of its proper divisors (139697).

308919 is an equidigital number, since it uses as much as digits as its factorization.

308919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 308919 is about 555.8048218575. The cubic root of 308919 is about 67.6002351684.

The spelling of 308919 in words is "three hundred eight thousand, nine hundred nineteen".