287874098521 has 9 divisors (see below), whose sum is σ = 288689254879. Its totient is φ = 287061241936.

The previous prime is 287874098513. The next prime is 287874098543. The reversal of 287874098521 is 125890478782.

The square root of 287874098521 is 536539.

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

It can be written as a sum of positive squares in only one way, i.e., 119885600025 + 167988498496 = 346245^2 + 409864^2 .

It is not a de Polignac number, because 287874098521 - 2³ = 287874098513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 287874098521.

It is not an unprimeable number, because it can be changed into a prime (287874098581) 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, 302070981 + ... + 302071933.

Almost surely, 2^287874098521 is an apocalyptic number.

287874098521 is the 536539-th square number.

287874098521 is the 268270-th centered octagonal number.

It is an amenable number.

287874098521 is a deficient number, since it is larger than the sum of its proper divisors (815156358).

287874098521 is an frugal number, since it uses more digits than its factorization.

287874098521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032 (or 1516 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 287874098521 in words is "two hundred eighty-seven billion, eight hundred seventy-four million, ninety-eight thousand, five hundred twenty-one".