363861 has 6 divisors (see below), whose sum is σ = 525590. Its totient is φ = 242568.

The previous prime is 363841. The next prime is 363871. The reversal of 363861 is 168363.

It can be written as a sum of positive squares in only one way, i.e., 352836 + 11025 = 594^2 + 105^2 .

It is not a de Polignac number, because 363861 - 2⁵ = 363829 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

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 363861.

It is not an unprimeable number, because it can be changed into a prime (363841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20206 + ... + 20223.

2³⁶³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

363861 is a deficient number, since it is larger than the sum of its proper divisors (161729).

363861 is a wasteful number, since it uses less digits than its factorization.

363861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40435 (or 40432 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 363861 is about 603.2089190322. The cubic root of 363861 is about 71.3912801535.

The spelling of 363861 in words is "three hundred sixty-three thousand, eight hundred sixty-one".