281195633893 has 2 divisors, whose sum is σ = 281195633894. Its totient is φ = 281195633892.

The previous prime is 281195633879. The next prime is 281195633909. The reversal of 281195633893 is 398336591182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259225576164 + 21970057729 = 509142^2 + 148223^2 .

It is a cyclic number.

It is not a de Polignac number, because 281195633893 - 2¹³ = 281195625701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281195634893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140597816946 + 140597816947.

It is an arithmetic number, because the mean of its divisors is an integer number (140597816947).

Almost surely, 2^281195633893 is an apocalyptic number.

It is an amenable number.

281195633893 is a deficient number, since it is larger than the sum of its proper divisors (1).

281195633893 is an equidigital number, since it uses as much as digits as its factorization.

281195633893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 58.

The spelling of 281195633893 in words is "two hundred eighty-one billion, one hundred ninety-five million, six hundred thirty-three thousand, eight hundred ninety-three".