485191813 has 2 divisors, whose sum is σ = 485191814. Its totient is φ = 485191812.

The previous prime is 485191789. The next prime is 485191853. The reversal of 485191813 is 318191584.

It is a happy number.

It is an a-pointer prime, because the next prime (485191853) can be obtained adding 485191813 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482153764 + 3038049 = 21958^2 + 1743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-485191813 is a prime.

It is a super-2 number, since 2×485191813² = 470822190804453938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (485191853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242595906 + 242595907.

It is an arithmetic number, because the mean of its divisors is an integer number (242595907).

Almost surely, 2^485191813 is an apocalyptic number.

It is an amenable number.

485191813 is a deficient number, since it is larger than the sum of its proper divisors (1).

485191813 is an equidigital number, since it uses as much as digits as its factorization.

485191813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 40.

The square root of 485191813 is about 22027.0700048826. The cubic root of 485191813 is about 785.7863638859.

The spelling of 485191813 in words is "four hundred eighty-five million, one hundred ninety-one thousand, eight hundred thirteen".