280236097 has 4 divisors (see below), whose sum is σ = 280327216. Its totient is φ = 280144980.

The previous prime is 280236091. The next prime is 280236127. The reversal of 280236097 is 790632082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 790632082 = 2 ⋅395316041.

It is a cyclic number.

It is not a de Polignac number, because 280236097 - 2¹¹ = 280234049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280236091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40779 + ... + 47152.

It is an arithmetic number, because the mean of its divisors is an integer number (70081804).

Almost surely, 2^280236097 is an apocalyptic number.

It is an amenable number.

280236097 is a deficient number, since it is larger than the sum of its proper divisors (91119).

280236097 is an equidigital number, since it uses as much as digits as its factorization.

280236097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91118.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 280236097 is about 16740.2537913856. The cubic root of 280236097 is about 654.3970886993.

The spelling of 280236097 in words is "two hundred eighty million, two hundred thirty-six thousand, ninety-seven".