492691813 has 2 divisors, whose sum is σ = 492691814. Its totient is φ = 492691812.

The previous prime is 492691789. The next prime is 492691847. The reversal of 492691813 is 318196294.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 469285569 + 23406244 = 21663^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 492691813 - 2¹⁷ = 492560741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 492691813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492691013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246345906 + 246345907.

It is an arithmetic number, because the mean of its divisors is an integer number (246345907).

Almost surely, 2^492691813 is an apocalyptic number.

It is an amenable number.

492691813 is a deficient number, since it is larger than the sum of its proper divisors (1).

492691813 is an equidigital number, since it uses as much as digits as its factorization.

492691813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 492691813 is about 22196.6622040342. The cubic root of 492691813 is about 789.8145230328.

The spelling of 492691813 in words is "four hundred ninety-two million, six hundred ninety-one thousand, eight hundred thirteen".