281264197 has 2 divisors, whose sum is σ = 281264198. Its totient is φ = 281264196.

The previous prime is 281264183. The next prime is 281264213. The reversal of 281264197 is 791462182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152917956 + 128346241 = 12366^2 + 11329^2 .

It is a cyclic number.

It is not a de Polignac number, because 281264197 - 2¹⁵ = 281231429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281265197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140632098 + 140632099.

It is an arithmetic number, because the mean of its divisors is an integer number (140632099).

Almost surely, 2^281264197 is an apocalyptic number.

It is an amenable number.

281264197 is a deficient number, since it is larger than the sum of its proper divisors (1).

281264197 is an equidigital number, since it uses as much as digits as its factorization.

281264197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 281264197 is about 16770.9330986681. The cubic root of 281264197 is about 655.1963725639.

It can be divided in two parts, 28126 and 4197, that added together give a palindrome (32323).

The spelling of 281264197 in words is "two hundred eighty-one million, two hundred sixty-four thousand, one hundred ninety-seven".