499774181 has 2 divisors, whose sum is σ = 499774182. Its totient is φ = 499774180.

The previous prime is 499774151. The next prime is 499774217. The reversal of 499774181 is 181477994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 479829025 + 19945156 = 21905^2 + 4466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499774181 is a prime.

It is a super-2 number, since 2×499774181² = 499548463988441522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499774141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249887090 + 249887091.

It is an arithmetic number, because the mean of its divisors is an integer number (249887091).

Almost surely, 2^499774181 is an apocalyptic number.

It is an amenable number.

499774181 is a deficient number, since it is larger than the sum of its proper divisors (1).

499774181 is an equidigital number, since it uses as much as digits as its factorization.

499774181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 50.

The square root of 499774181 is about 22355.6297383903. The cubic root of 499774181 is about 793.5810195517.

The spelling of 499774181 in words is "four hundred ninety-nine million, seven hundred seventy-four thousand, one hundred eighty-one".