280997823 has 8 divisors (see below), whose sum is σ = 377399088. Its totient is φ = 185964224.

The previous prime is 280997809. The next prime is 280997833. The reversal of 280997823 is 328799082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 280997823 - 2⁴ = 280997807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280997803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341436 + ... + 342257.

It is an arithmetic number, because the mean of its divisors is an integer number (47174886).

Almost surely, 2^280997823 is an apocalyptic number.

280997823 is a deficient number, since it is larger than the sum of its proper divisors (96401265).

280997823 is a wasteful number, since it uses less digits than its factorization.

280997823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683833.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 280997823 is about 16762.9896796484. The cubic root of 280997823 is about 654.9894705298.

The spelling of 280997823 in words is "two hundred eighty million, nine hundred ninety-seven thousand, eight hundred twenty-three".