499997783 has 2 divisors, whose sum is σ = 499997784. Its totient is φ = 499997782.

The previous prime is 499997731. The next prime is 499997789. The reversal of 499997783 is 387799994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 499997783 - 2²⁰ = 498949207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499997789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249998891 + 249998892.

It is an arithmetic number, because the mean of its divisors is an integer number (249998892).

Almost surely, 2^499997783 is an apocalyptic number.

499997783 is a deficient number, since it is larger than the sum of its proper divisors (1).

499997783 is an equidigital number, since it uses as much as digits as its factorization.

499997783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30862944, while the sum is 65.

The square root of 499997783 is about 22360.6302013159. The cubic root of 499997783 is about 793.6993528930.

The spelling of 499997783 in words is "four hundred ninety-nine million, nine hundred ninety-seven thousand, seven hundred eighty-three".