499981457 has 2 divisors, whose sum is σ = 499981458. Its totient is φ = 499981456.

The previous prime is 499981451. The next prime is 499981519. The reversal of 499981457 is 754189994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495997441 + 3984016 = 22271^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 499981457 - 2¹⁰ = 499980433 is a prime.

It is not a weakly prime, because it can be changed into another prime (499981451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249990728 + 249990729.

It is an arithmetic number, because the mean of its divisors is an integer number (249990729).

Almost surely, 2^499981457 is an apocalyptic number.

It is an amenable number.

499981457 is a deficient number, since it is larger than the sum of its proper divisors (1).

499981457 is an equidigital number, since it uses as much as digits as its factorization.

499981457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 499981457 is about 22360.2651370685. The cubic root of 499981457 is about 793.6907141369.

The spelling of 499981457 in words is "four hundred ninety-nine million, nine hundred eighty-one thousand, four hundred fifty-seven".