279820898361 has 9 divisors (see below), whose sum is σ = 404188034341. Its totient is φ = 186546207612.

The previous prime is 279820898351. The next prime is 279820898363. The reversal of 279820898361 is 163898028972.

The square root of 279820898361 is 528981.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 279820898361 - 2⁹ = 279820897849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279820898363) 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, 1498780 + ... + 1675106.

Almost surely, 2^279820898361 is an apocalyptic number.

279820898361 is the 528981-st square number.

279820898361 is the 264491-st centered octagonal number.

It is an amenable number.

279820898361 is a deficient number, since it is larger than the sum of its proper divisors (124367135980).

279820898361 is an frugal number, since it uses more digits than its factorization.

279820898361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352660 (or 176330 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 279820898361 in words is "two hundred seventy-nine billion, eight hundred twenty million, eight hundred ninety-eight thousand, three hundred sixty-one".