499209643 has 2 divisors, whose sum is σ = 499209644. Its totient is φ = 499209642.

The previous prime is 499209631. The next prime is 499209653. The reversal of 499209643 is 346902994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499209643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 499209593 and 499209602.

It is not a weakly prime, because it can be changed into another prime (499209653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249604821 + 249604822.

It is an arithmetic number, because the mean of its divisors is an integer number (249604822).

Almost surely, 2^499209643 is an apocalyptic number.

499209643 is a deficient number, since it is larger than the sum of its proper divisors (1).

499209643 is an equidigital number, since it uses as much as digits as its factorization.

499209643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 499209643 is about 22342.9998657298. Note that the first 3 decimals coincide. The cubic root of 499209643 is about 793.2821009254.

The spelling of 499209643 in words is "four hundred ninety-nine million, two hundred nine thousand, six hundred forty-three".