365813 has 4 divisors (see below), whose sum is σ = 418080. Its totient is φ = 313548.

The previous prime is 365809. The next prime is 365837. The reversal of 365813 is 318563.

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.

It is a cyclic number.

It is not a de Polignac number, because 365813 - 2² = 365809 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 (365213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26123 + ... + 26136.

It is an arithmetic number, because the mean of its divisors is an integer number (104520).

2³⁶⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

365813 is a deficient number, since it is larger than the sum of its proper divisors (52267).

365813 is an equidigital number, since it uses as much as digits as its factorization.

365813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52266.

The product of its digits is 2160, while the sum is 26.

The square root of 365813 is about 604.8247680114. The cubic root of 365813 is about 71.5187164721.

The spelling of 365813 in words is "three hundred sixty-five thousand, eight hundred thirteen".