308113 has 8 divisors (see below), whose sum is σ = 336168. Its totient is φ = 280704.

The previous prime is 308107. The next prime is 308117. The reversal of 308113 is 311803.

308113 = 392² + 393².

It can be written as a sum of positive squares in 4 ways, for example, as 66049 + 242064 = 257^2 + 492^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 308113 - 2⁵ = 308081 is a prime.

It is a Duffinian number.

308113 is a lucky number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (308117) 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, 1695 + ... + 1867.

It is an arithmetic number, because the mean of its divisors is an integer number (42021).

2³⁰⁸¹¹³ is an apocalyptic number.

308113 is the 393-rd centered square number.

It is an amenable number.

308113 is a deficient number, since it is larger than the sum of its proper divisors (28055).

308113 is a wasteful number, since it uses less digits than its factorization.

308113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 308113 is about 555.0792736177. The cubic root of 308113 is about 67.5413920794.

Adding to 308113 its reverse (311803), we get a palindrome (619916).

The spelling of 308113 in words is "three hundred eight thousand, one hundred thirteen".