280835897 has 2 divisors, whose sum is σ = 280835898. Its totient is φ = 280835896.

The previous prime is 280835873. The next prime is 280835909. The reversal of 280835897 is 798538082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280763536 + 72361 = 16756^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 280835897 - 2¹² = 280831801 is a prime.

It is not a weakly prime, because it can be changed into another prime (280835197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140417948 + 140417949.

It is an arithmetic number, because the mean of its divisors is an integer number (140417949).

Almost surely, 2^280835897 is an apocalyptic number.

It is an amenable number.

280835897 is a deficient number, since it is larger than the sum of its proper divisors (1).

280835897 is an equidigital number, since it uses as much as digits as its factorization.

280835897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 280835897 is about 16758.1591172778. The cubic root of 280835897 is about 654.8636330140.

The spelling of 280835897 in words is "two hundred eighty million, eight hundred thirty-five thousand, eight hundred ninety-seven".