280493101 has 6 divisors (see below), whose sum is σ = 326287950. Its totient is φ = 240422616.

The previous prime is 280493093. The next prime is 280493107. The reversal of 280493101 is 101394082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 256960900 + 23532201 = 16030^2 + 4851^2 .

It is not a de Polignac number, because 280493101 - 2³ = 280493093 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 280493101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280493107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2862126 + ... + 2862223.

It is an arithmetic number, because the mean of its divisors is an integer number (54381325).

Almost surely, 2^280493101 is an apocalyptic number.

It is an amenable number.

280493101 is a deficient number, since it is larger than the sum of its proper divisors (45794849).

280493101 is an equidigital number, since it uses as much as digits as its factorization.

280493101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724363 (or 5724356 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 280493101 is about 16747.9282599371. The cubic root of 280493101 is about 654.5970763574.

The spelling of 280493101 in words is "two hundred eighty million, four hundred ninety-three thousand, one hundred one".