280123201 has 2 divisors, whose sum is σ = 280123202. Its totient is φ = 280123200.

The previous prime is 280123171. The next prime is 280123211. The reversal of 280123201 is 102321082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189778176 + 90345025 = 13776^2 + 9505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280123201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280123211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140061600 + 140061601.

It is an arithmetic number, because the mean of its divisors is an integer number (140061601).

Almost surely, 2^280123201 is an apocalyptic number.

It is an amenable number.

280123201 is a deficient number, since it is larger than the sum of its proper divisors (1).

280123201 is an equidigital number, since it uses as much as digits as its factorization.

280123201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 280123201 is about 16736.8814598180. The cubic root of 280123201 is about 654.3092000253.

Adding to 280123201 its reverse (102321082), we get a palindrome (382444283).

It can be divided in two parts, 28012 and 3201, that added together give a palindrome (31213).

The spelling of 280123201 in words is "two hundred eighty million, one hundred twenty-three thousand, two hundred one".