820195741 has 2 divisors, whose sum is σ = 820195742. Its totient is φ = 820195740.

The previous prime is 820195657. The next prime is 820195793. The reversal of 820195741 is 147591028.

820195741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806844025 + 13351716 = 28405^2 + 3654^2 .

It is a cyclic number.

It is not a de Polignac number, because 820195741 - 2²³ = 811807133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 820195741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820193741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410097870 + 410097871.

It is an arithmetic number, because the mean of its divisors is an integer number (410097871).

Almost surely, 2^820195741 is an apocalyptic number.

It is an amenable number.

820195741 is a deficient number, since it is larger than the sum of its proper divisors (1).

820195741 is an equidigital number, since it uses as much as digits as its factorization.

820195741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 820195741 is about 28639.0597087265. The cubic root of 820195741 is about 936.0646326695.

The spelling of 820195741 in words is "eight hundred twenty million, one hundred ninety-five thousand, seven hundred forty-one".