365399 has 4 divisors (see below), whose sum is σ = 369264. Its totient is φ = 361536.

The previous prime is 365377. The next prime is 365411. The reversal of 365399 is 993563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993563 = 293 ⋅3391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-365399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 365399.

It is not an unprimeable number, because it can be changed into a prime (365369) 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, 1787 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (92316).

2³⁶⁵³⁹⁹ is an apocalyptic number.

365399 is a deficient number, since it is larger than the sum of its proper divisors (3865).

365399 is an equidigital number, since it uses as much as digits as its factorization.

365399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864.

The product of its digits is 21870, while the sum is 35.

The square root of 365399 is about 604.4824232350. The cubic root of 365399 is about 71.4917264295.

The spelling of 365399 in words is "three hundred sixty-five thousand, three hundred ninety-nine".