364991 has 4 divisors (see below), whose sum is σ = 398184. Its totient is φ = 331800.

The previous prime is 364979. The next prime is 364993. The reversal of 364991 is 199463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199463 = 11 ⋅18133.

It is a cyclic number.

It is not a de Polignac number, because 364991 - 2¹⁰ = 363967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (364993) 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, 16580 + ... + 16601.

It is an arithmetic number, because the mean of its divisors is an integer number (99546).

2³⁶⁴⁹⁹¹ is an apocalyptic number.

364991 is a deficient number, since it is larger than the sum of its proper divisors (33193).

364991 is a wasteful number, since it uses less digits than its factorization.

364991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33192.

The product of its digits is 5832, while the sum is 32.

The square root of 364991 is about 604.1448501808. The cubic root of 364991 is about 71.4651075940.

The spelling of 364991 in words is "three hundred sixty-four thousand, nine hundred ninety-one".