280165900249 has 3 divisors (see below), whose sum is σ = 280166429557. Its totient is φ = 280165370942.

The previous prime is 280165900171. The next prime is 280165900253. The reversal of 280165900249 is 942009561082.

The square root of 280165900249 is 529307.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 280165900249 - 2²⁵ = 280132345817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280165900199 and 280165900208.

It is not an unprimeable number, because it can be changed into a prime (280165900549) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 264654 + ... + 793960.

Almost surely, 2^280165900249 is an apocalyptic number.

280165900249 is the 529307-th square number.

280165900249 is the 264654-th centered octagonal number.

It is an amenable number.

280165900249 is a deficient number, since it is larger than the sum of its proper divisors (529308).

280165900249 is an frugal number, since it uses more digits than its factorization.

280165900249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058614 (or 529307 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 280165900249 in words is "two hundred eighty billion, one hundred sixty-five million, nine hundred thousand, two hundred forty-nine".