499947257 has 2 divisors, whose sum is σ = 499947258. Its totient is φ = 499947256.

The previous prime is 499947241. The next prime is 499947307. The reversal of 499947257 is 752749994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492351721 + 7595536 = 22189^2 + 2756^2 .

It is a cyclic number.

It is not a de Polignac number, because 499947257 - 2⁴ = 499947241 is a prime.

It is not a weakly prime, because it can be changed into another prime (499947457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249973628 + 249973629.

It is an arithmetic number, because the mean of its divisors is an integer number (249973629).

Almost surely, 2^499947257 is an apocalyptic number.

It is an amenable number.

499947257 is a deficient number, since it is larger than the sum of its proper divisors (1).

499947257 is an equidigital number, since it uses as much as digits as its factorization.

499947257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 56.

The square root of 499947257 is about 22359.5003745611. The cubic root of 499947257 is about 793.6726169048.

The spelling of 499947257 in words is "four hundred ninety-nine million, nine hundred forty-seven thousand, two hundred fifty-seven".