298877609809 has 9 divisors (see below), whose sum is σ = 303068377233. Its totient is φ = 294744033792.

The previous prime is 298877609803. The next prime is 298877609867. The reversal of 298877609809 is 908906778892.

The square root of 298877609809 is 546697.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1494982225 + 297382627584 = 38665^2 + 545328^2 .

It is not a de Polignac number, because 298877609809 - 2²³ = 298869221201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (298877609803) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39905137 + ... + 39912625.

It is an arithmetic number, because the mean of its divisors is an integer number (33674264137).

Almost surely, 2^298877609809 is an apocalyptic number.

298877609809 is the 546697-th square number.

298877609809 is the 273349-th centered octagonal number.

It is an amenable number.

298877609809 is a deficient number, since it is larger than the sum of its proper divisors (4190767424).

298877609809 is an frugal number, since it uses more digits than its factorization.

298877609809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15124 (or 7562 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 73.

It can be divided in two parts, 29887 and 7609809, that added together give a square (7639696 = 2764²).

The spelling of 298877609809 in words is "two hundred ninety-eight billion, eight hundred seventy-seven million, six hundred nine thousand, eight hundred nine".