491652001 has 2 divisors, whose sum is σ = 491652002. Its totient is φ = 491652000.

The previous prime is 491651989. The next prime is 491652011. The reversal of 491652001 is 100256194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438944401 + 52707600 = 20951^2 + 7260^2 .

It is a cyclic number.

It is not a de Polignac number, because 491652001 - 2¹³ = 491643809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491652011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245826000 + 245826001.

It is an arithmetic number, because the mean of its divisors is an integer number (245826001).

Almost surely, 2^491652001 is an apocalyptic number.

It is an amenable number.

491652001 is a deficient number, since it is larger than the sum of its proper divisors (1).

491652001 is an equidigital number, since it uses as much as digits as its factorization.

491652001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 491652001 is about 22173.2271219144. The cubic root of 491652001 is about 789.2585046977.

The spelling of 491652001 in words is "four hundred ninety-one million, six hundred fifty-two thousand, one".