308961 has 8 divisors (see below), whose sum is σ = 457760. Its totient is φ = 205956.

The previous prime is 308951. The next prime is 308989. The reversal of 308961 is 169803.

It is not a de Polignac number, because 308961 - 2⁵ = 308929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 11443 = 308961 / (3 + 0 + 8 + 9 + 6 + 1).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308961.

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 7 ways as a sum of consecutive naturals, for example, 5695 + ... + 5748.

It is an arithmetic number, because the mean of its divisors is an integer number (57220).

2³⁰⁸⁹⁶¹ is an apocalyptic number.

It is an amenable number.

308961 is a deficient number, since it is larger than the sum of its proper divisors (148799).

308961 is a wasteful number, since it uses less digits than its factorization.

308961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11452 (or 11446 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 308961 is about 555.8426036208. The cubic root of 308961 is about 67.6032986264.

The spelling of 308961 in words is "three hundred eight thousand, nine hundred sixty-one".