313861 has 4 divisors (see below), whose sum is σ = 330400. Its totient is φ = 297324.

The previous prime is 313853. The next prime is 313879. The reversal of 313861 is 168313.

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: 168313 = 37 ⋅4549.

It is a cyclic number.

It is not a de Polignac number, because 313861 - 2³ = 313853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8241 + ... + 8278.

It is an arithmetic number, because the mean of its divisors is an integer number (82600).

2³¹³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

313861 is a deficient number, since it is larger than the sum of its proper divisors (16539).

313861 is a wasteful number, since it uses less digits than its factorization.

313861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16538.

The product of its digits is 432, while the sum is 22.

The square root of 313861 is about 560.2329872473. The cubic root of 313861 is about 67.9588130054.

The spelling of 313861 in words is "three hundred thirteen thousand, eight hundred sixty-one".