319961 has 4 divisors (see below), whose sum is σ = 326052. Its totient is φ = 313872.

The previous prime is 319937. The next prime is 319967. The reversal of 319961 is 169913.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 175561 = 380^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 319961 - 2⁶ = 319897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319967) 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, 2966 + ... + 3071.

It is an arithmetic number, because the mean of its divisors is an integer number (81513).

2³¹⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

319961 is a deficient number, since it is larger than the sum of its proper divisors (6091).

319961 is an equidigital number, since it uses as much as digits as its factorization.

319961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090.

The product of its digits is 1458, while the sum is 29.

The square root of 319961 is about 565.6509524433. The cubic root of 319961 is about 68.3962590433.

The spelling of 319961 in words is "three hundred nineteen thousand, nine hundred sixty-one".