499139779 has 2 divisors, whose sum is σ = 499139780. Its totient is φ = 499139778.

The previous prime is 499139723. The next prime is 499139783. The reversal of 499139779 is 977931994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499139779 is a prime.

It is not a weakly prime, because it can be changed into another prime (499139579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249569889 + 249569890.

It is an arithmetic number, because the mean of its divisors is an integer number (249569890).

Almost surely, 2^499139779 is an apocalyptic number.

499139779 is a deficient number, since it is larger than the sum of its proper divisors (1).

499139779 is an equidigital number, since it uses as much as digits as its factorization.

499139779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 58.

The square root of 499139779 is about 22341.4363683269. The cubic root of 499139779 is about 793.2450927953.

The spelling of 499139779 in words is "four hundred ninety-nine million, one hundred thirty-nine thousand, seven hundred seventy-nine".