1797949205 has 16 divisors (see below), whose sum is σ = 2326215024. Its totient is φ = 1326167040.

The previous prime is 1797949183. The next prime is 1797949213. The reversal of 1797949205 is 5029497971.

It can be written as a sum of positive squares in 8 ways, for example, as 384865924 + 1413083281 = 19618^2 + 37591^2 .

It is not a de Polignac number, because 1797949205 - 2²² = 1793754901 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 15 ways as a sum of consecutive naturals, for example, 41567 + ... + 72963.

It is an arithmetic number, because the mean of its divisors is an integer number (145388439).

Almost surely, 2^1797949205 is an apocalyptic number.

It is an amenable number.

1797949205 is a deficient number, since it is larger than the sum of its proper divisors (528265819).

1797949205 is a wasteful number, since it uses less digits than its factorization.

1797949205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32296.

The product of its (nonzero) digits is 1428840, while the sum is 53.

The square root of 1797949205 is about 42402.2311323355. The cubic root of 1797949205 is about 1215.9782476505.

The spelling of 1797949205 in words is "one billion, seven hundred ninety-seven million, nine hundred forty-nine thousand, two hundred five".