281974361 has 2 divisors, whose sum is σ = 281974362. Its totient is φ = 281974360.

The previous prime is 281974333. The next prime is 281974387. The reversal of 281974361 is 163479182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197683600 + 84290761 = 14060^2 + 9181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281974361 is a prime.

It is a super-2 number, since 2×281974361² = 159019080522716642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (281974331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140987180 + 140987181.

It is an arithmetic number, because the mean of its divisors is an integer number (140987181).

Almost surely, 2^281974361 is an apocalyptic number.

It is an amenable number.

281974361 is a deficient number, since it is larger than the sum of its proper divisors (1).

281974361 is an equidigital number, since it uses as much as digits as its factorization.

281974361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 281974361 is about 16792.0922162785. The cubic root of 281974361 is about 655.7473442372.

The spelling of 281974361 in words is "two hundred eighty-one million, nine hundred seventy-four thousand, three hundred sixty-one".