499749281 has 2 divisors, whose sum is σ = 499749282. Its totient is φ = 499749280.

The previous prime is 499749277. The next prime is 499749301. The reversal of 499749281 is 182947994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286151056 + 213598225 = 16916^2 + 14615^2 .

It is a cyclic number.

It is not a de Polignac number, because 499749281 - 2² = 499749277 is a prime.

It is a super-2 number, since 2×499749281² = 499498687720033922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (499749581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249874640 + 249874641.

It is an arithmetic number, because the mean of its divisors is an integer number (249874641).

Almost surely, 2^499749281 is an apocalyptic number.

It is an amenable number.

499749281 is a deficient number, since it is larger than the sum of its proper divisors (1).

499749281 is an equidigital number, since it uses as much as digits as its factorization.

499749281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 499749281 is about 22355.0728247528. The cubic root of 499749281 is about 793.5678399356.

The spelling of 499749281 in words is "four hundred ninety-nine million, seven hundred forty-nine thousand, two hundred eighty-one".