365649 has 4 divisors (see below), whose sum is σ = 487536. Its totient is φ = 243764.

The previous prime is 365641. The next prime is 365669. The reversal of 365649 is 946563.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 946563 = 3 ⋅315521.

It is a cyclic number.

It is not a de Polignac number, because 365649 - 2³ = 365641 is a prime.

It is a d-powerful number, because it can be written as 3⁷ + 6⁴ + 6⁷ + 5⁷ + 4⁶ + 9 .

It is a D-number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 365649.

It is not an unprimeable number, because it can be changed into a prime (365641) 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, 60939 + ... + 60944.

It is an arithmetic number, because the mean of its divisors is an integer number (121884).

2³⁶⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

365649 is a deficient number, since it is larger than the sum of its proper divisors (121887).

365649 is a wasteful number, since it uses less digits than its factorization.

365649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121886.

The product of its digits is 19440, while the sum is 33.

The square root of 365649 is about 604.6891763543. The cubic root of 365649 is about 71.5080272012.

The spelling of 365649 in words is "three hundred sixty-five thousand, six hundred forty-nine".