361869 has 4 divisors (see below), whose sum is σ = 482496. Its totient is φ = 241244.

The previous prime is 361843. The next prime is 361871. The reversal of 361869 is 968163.

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 361869 - 2⁹ = 361357 is a prime.

It is a super-2 number, since 2×361869² = 261898346322, which contains 22 as substring.

It is a D-number.

It is a Curzon 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 361869.

It is not an unprimeable number, because it can be changed into a prime (361069) 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, 60309 + ... + 60314.

It is an arithmetic number, because the mean of its divisors is an integer number (120624).

2³⁶¹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

361869 is a deficient number, since it is larger than the sum of its proper divisors (120627).

361869 is a wasteful number, since it uses less digits than its factorization.

361869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120626.

The product of its digits is 7776, while the sum is 33.

The square root of 361869 is about 601.5554837253. Note that the first 3 decimals coincide. The cubic root of 361869 is about 71.2607616862.

The spelling of 361869 in words is "three hundred sixty-one thousand, eight hundred sixty-nine".