365803 has 4 divisors (see below), whose sum is σ = 370888. Its totient is φ = 360720.

The previous prime is 365797. The next prime is 365809. The reversal of 365803 is 308563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308563 = 89 ⋅3467.

It is an interprime number because it is at equal distance from previous prime (365797) and next prime (365809).

It is a cyclic number.

It is not a de Polignac number, because 365803 - 2⁹ = 365291 is a prime.

It is a Duffinian number.

365803 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (365809) 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, 2433 + ... + 2578.

It is an arithmetic number, because the mean of its divisors is an integer number (92722).

2³⁶⁵⁸⁰³ is an apocalyptic number.

365803 is a deficient number, since it is larger than the sum of its proper divisors (5085).

365803 is an equidigital number, since it uses as much as digits as its factorization.

365803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 365803 is about 604.8165010976. The cubic root of 365803 is about 71.5180647787.

The spelling of 365803 in words is "three hundred sixty-five thousand, eight hundred three".