499974191 has 2 divisors, whose sum is σ = 499974192. Its totient is φ = 499974190.

The previous prime is 499974187. The next prime is 499974221. The reversal of 499974191 is 191479994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 499974191 - 2² = 499974187 is a prime.

It is a super-2 number, since 2×499974191² = 499948383332208962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499974121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249987095 + 249987096.

It is an arithmetic number, because the mean of its divisors is an integer number (249987096).

Almost surely, 2^499974191 is an apocalyptic number.

499974191 is a deficient number, since it is larger than the sum of its proper divisors (1).

499974191 is an equidigital number, since it uses as much as digits as its factorization.

499974191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 53.

The square root of 499974191 is about 22360.1026607661. The cubic root of 499974191 is about 793.6868693379.

The spelling of 499974191 in words is "four hundred ninety-nine million, nine hundred seventy-four thousand, one hundred ninety-one".