1799953165 has 4 divisors (see below), whose sum is σ = 2159943804. Its totient is φ = 1439962528.

The previous prime is 1799953153. The next prime is 1799953187. The reversal of 1799953165 is 5613599971.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1340365321 + 459587844 = 36611^2 + 21438^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799953165 - 2¹³ = 1799944973 is a prime.

It is a Duffinian number.

It is a congruent 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, 179995312 + ... + 179995321.

It is an arithmetic number, because the mean of its divisors is an integer number (539985951).

Almost surely, 2^1799953165 is an apocalyptic number.

It is an amenable number.

1799953165 is a deficient number, since it is larger than the sum of its proper divisors (359990639).

1799953165 is an equidigital number, since it uses as much as digits as its factorization.

1799953165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359990638.

The product of its digits is 2296350, while the sum is 55.

The square root of 1799953165 is about 42425.8549118341. The cubic root of 1799953165 is about 1216.4298486554.

The spelling of 1799953165 in words is "one billion, seven hundred ninety-nine million, nine hundred fifty-three thousand, one hundred sixty-five".