499066721 has 2 divisors, whose sum is σ = 499066722. Its totient is φ = 499066720.

The previous prime is 499066697. The next prime is 499066723. The reversal of 499066721 is 127660994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435306496 + 63760225 = 20864^2 + 7985^2 .

It is a cyclic number.

It is not a de Polignac number, because 499066721 - 2⁶ = 499066657 is a prime.

Together with 499066723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (499066723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249533360 + 249533361.

It is an arithmetic number, because the mean of its divisors is an integer number (249533361).

Almost surely, 2^499066721 is an apocalyptic number.

It is an amenable number.

499066721 is a deficient number, since it is larger than the sum of its proper divisors (1).

499066721 is an equidigital number, since it uses as much as digits as its factorization.

499066721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 499066721 is about 22339.8012748547. The cubic root of 499066721 is about 793.2063890559.

The spelling of 499066721 in words is "four hundred ninety-nine million, sixty-six thousand, seven hundred twenty-one".