41720813 has 2 divisors, whose sum is σ = 41720814. Its totient is φ = 41720812.

The previous prime is 41720801. The next prime is 41720837. The reversal of 41720813 is 31802714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25180324 + 16540489 = 5018^2 + 4067^2 .

It is a cyclic number.

It is not a de Polignac number, because 41720813 - 2²⁰ = 40672237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41720893) 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, 20860406 + 20860407.

It is an arithmetic number, because the mean of its divisors is an integer number (20860407).

Almost surely, 2^41720813 is an apocalyptic number.

It is an amenable number.

41720813 is a deficient number, since it is larger than the sum of its proper divisors (1).

41720813 is an equidigital number, since it uses as much as digits as its factorization.

41720813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 41720813 is about 6459.1650389195. The cubic root of 41720813 is about 346.8307440549.

The spelling of 41720813 in words is "forty-one million, seven hundred twenty thousand, eight hundred thirteen".