499543123 has 2 divisors, whose sum is σ = 499543124. Its totient is φ = 499543122.

The previous prime is 499543111. The next prime is 499543127. The reversal of 499543123 is 321345994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499543123 is a prime.

It is not a weakly prime, because it can be changed into another prime (499543127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249771561 + 249771562.

It is an arithmetic number, because the mean of its divisors is an integer number (249771562).

Almost surely, 2^499543123 is an apocalyptic number.

499543123 is a deficient number, since it is larger than the sum of its proper divisors (1).

499543123 is an equidigital number, since it uses as much as digits as its factorization.

499543123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 499543123 is about 22350.4613598914. The cubic root of 499543123 is about 793.4587033035.

The spelling of 499543123 in words is "four hundred ninety-nine million, five hundred forty-three thousand, one hundred twenty-three".