280430113 has 4 divisors (see below), whose sum is σ = 296926020. Its totient is φ = 263934208.

The previous prime is 280430089. The next prime is 280430131. The reversal of 280430113 is 311034082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157929489 + 122500624 = 12567^2 + 11068^2 .

It is a cyclic number.

It is not a de Polignac number, because 280430113 - 2²¹ = 278332961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280430173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8247928 + ... + 8247961.

It is an arithmetic number, because the mean of its divisors is an integer number (74231505).

Almost surely, 2^280430113 is an apocalyptic number.

It is an amenable number.

280430113 is a deficient number, since it is larger than the sum of its proper divisors (16495907).

280430113 is a wasteful number, since it uses less digits than its factorization.

280430113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16495906.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 280430113 is about 16746.0476829609. The cubic root of 280430113 is about 654.5480735509.

Adding to 280430113 its reverse (311034082), we get a palindrome (591464195).

The spelling of 280430113 in words is "two hundred eighty million, four hundred thirty thousand, one hundred thirteen".