499095661 has 2 divisors, whose sum is σ = 499095662. Its totient is φ = 499095660.

The previous prime is 499095659. The next prime is 499095689. The reversal of 499095661 is 166590994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407797636 + 91298025 = 20194^2 + 9555^2 .

It is a cyclic number.

It is not a de Polignac number, because 499095661 - 2¹ = 499095659 is a prime.

Together with 499095659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499095601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249547830 + 249547831.

It is an arithmetic number, because the mean of its divisors is an integer number (249547831).

Almost surely, 2^499095661 is an apocalyptic number.

It is an amenable number.

499095661 is a deficient number, since it is larger than the sum of its proper divisors (1).

499095661 is an equidigital number, since it uses as much as digits as its factorization.

499095661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 499095661 is about 22340.4489883261. The cubic root of 499095661 is about 793.2217209733.

The spelling of 499095661 in words is "four hundred ninety-nine million, ninety-five thousand, six hundred sixty-one".