820162741 has 2 divisors, whose sum is σ = 820162742. Its totient is φ = 820162740.

The previous prime is 820162667. The next prime is 820162787. The reversal of 820162741 is 147261028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570206641 + 249956100 = 23879^2 + 15810^2 .

It is a cyclic number.

It is not a de Polignac number, because 820162741 - 2⁷ = 820162613 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 (820162241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410081370 + 410081371.

It is an arithmetic number, because the mean of its divisors is an integer number (410081371).

Almost surely, 2^820162741 is an apocalyptic number.

It is an amenable number.

820162741 is a deficient number, since it is larger than the sum of its proper divisors (1).

820162741 is an equidigital number, since it uses as much as digits as its factorization.

820162741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 820162741 is about 28638.4835666975. The cubic root of 820162741 is about 936.0520785333.

The spelling of 820162741 in words is "eight hundred twenty million, one hundred sixty-two thousand, seven hundred forty-one".