493665901 has 2 divisors, whose sum is σ = 493665902. Its totient is φ = 493665900.

The previous prime is 493665899. The next prime is 493665959. The reversal of 493665901 is 109566394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 468765801 + 24900100 = 21651^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 493665901 - 2¹ = 493665899 is a prime.

Together with 493665899, 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 (493665001) 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, 246832950 + 246832951.

It is an arithmetic number, because the mean of its divisors is an integer number (246832951).

Almost surely, 2^493665901 is an apocalyptic number.

It is an amenable number.

493665901 is a deficient number, since it is larger than the sum of its proper divisors (1).

493665901 is an equidigital number, since it uses as much as digits as its factorization.

493665901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 493665901 is about 22218.5935873538. The cubic root of 493665901 is about 790.3346875422.

The spelling of 493665901 in words is "four hundred ninety-three million, six hundred sixty-five thousand, nine hundred one".