499145261 has 2 divisors, whose sum is σ = 499145262. Its totient is φ = 499145260.

The previous prime is 499145221. The next prime is 499145341. The reversal of 499145261 is 162541994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428904100 + 70241161 = 20710^2 + 8381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499145261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499145201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249572630 + 249572631.

It is an arithmetic number, because the mean of its divisors is an integer number (249572631).

Almost surely, 2^499145261 is an apocalyptic number.

It is an amenable number.

499145261 is a deficient number, since it is larger than the sum of its proper divisors (1).

499145261 is an equidigital number, since it uses as much as digits as its factorization.

499145261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 499145261 is about 22341.5590548198. The cubic root of 499145261 is about 793.2479968273.

The spelling of 499145261 in words is "four hundred ninety-nine million, one hundred forty-five thousand, two hundred sixty-one".