364809985 has 4 divisors (see below), whose sum is σ = 437771988. Its totient is φ = 291847984.

The previous prime is 364809967. The next prime is 364810001. The reversal of 364809985 is 589908463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589908463 = 659 ⋅895157.

It can be written as a sum of positive squares in 2 ways, for example, as 263445361 + 101364624 = 16231^2 + 10068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-364809985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36480994 + ... + 36481003.

It is an arithmetic number, because the mean of its divisors is an integer number (109442997).

Almost surely, 2^364809985 is an apocalyptic number.

It is an amenable number.

364809985 is a deficient number, since it is larger than the sum of its proper divisors (72962003).

364809985 is an equidigital number, since it uses as much as digits as its factorization.

364809985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72962002.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 364809985 is about 19099.9996073298. Note that the first 3 decimals coincide. The cubic root of 364809985 is about 714.5329141630.

The spelling of 364809985 in words is "three hundred sixty-four million, eight hundred nine thousand, nine hundred eighty-five".