308971 has 4 divisors (see below), whose sum is σ = 332752. Its totient is φ = 285192.

The previous prime is 308951. The next prime is 308989. The reversal of 308971 is 179803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179803 = 13 ⋅13831.

It is a cyclic number.

It is not a de Polignac number, because 308971 - 2⁵ = 308939 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (308951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11871 + ... + 11896.

It is an arithmetic number, because the mean of its divisors is an integer number (83188).

2³⁰⁸⁹⁷¹ is an apocalyptic number.

308971 is a deficient number, since it is larger than the sum of its proper divisors (23781).

308971 is a wasteful number, since it uses less digits than its factorization.

308971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23780.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 308971 is about 555.8515989003. The cubic root of 308971 is about 67.6040279803.

It can be divided in two parts, 3089 and 71, that added together give a triangular number (3160 = T₇₉).

The spelling of 308971 in words is "three hundred eight thousand, nine hundred seventy-one".