361309 has 4 divisors (see below), whose sum is σ = 389116. Its totient is φ = 333504.

The previous prime is 361279. The next prime is 361313. The reversal of 361309 is 903163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27225 + 334084 = 165^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 361309 - 2¹³ = 353117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 361309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13884 + ... + 13909.

It is an arithmetic number, because the mean of its divisors is an integer number (97279).

2³⁶¹³⁰⁹ is an apocalyptic number.

It is an amenable number.

361309 is a deficient number, since it is larger than the sum of its proper divisors (27807).

361309 is a wasteful number, since it uses less digits than its factorization.

361309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27806.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 361309 is about 601.0898435342. The cubic root of 361309 is about 71.2239835249.

The spelling of 361309 in words is "three hundred sixty-one thousand, three hundred nine".