364639 has 4 divisors (see below), whose sum is σ = 397800. Its totient is φ = 331480.

The previous prime is 364627. The next prime is 364643. The reversal of 364639 is 936463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936463 = 11 ⋅85133.

It is a cyclic number.

It is not a de Polignac number, because 364639 - 2⁵ = 364607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 364639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (364669) 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, 16564 + ... + 16585.

It is an arithmetic number, because the mean of its divisors is an integer number (99450).

2³⁶⁴⁶³⁹ is an apocalyptic number.

364639 is a deficient number, since it is larger than the sum of its proper divisors (33161).

364639 is a wasteful number, since it uses less digits than its factorization.

364639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33160.

The product of its digits is 11664, while the sum is 31.

The square root of 364639 is about 603.8534590445. The cubic root of 364639 is about 71.4421263799.

The spelling of 364639 in words is "three hundred sixty-four thousand, six hundred thirty-nine".