1821795113 has 2 divisors, whose sum is σ = 1821795114. Its totient is φ = 1821795112.

The previous prime is 1821795071. The next prime is 1821795119. The reversal of 1821795113 is 3115971281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1791236329 + 30558784 = 42323^2 + 5528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1821795113 - 2⁶ = 1821795049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1821795119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910897556 + 910897557.

It is an arithmetic number, because the mean of its divisors is an integer number (910897557).

Almost surely, 2^1821795113 is an apocalyptic number.

It is an amenable number.

1821795113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821795113 is an equidigital number, since it uses as much as digits as its factorization.

1821795113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 38.

The square root of 1821795113 is about 42682.4918789894. The cubic root of 1821795113 is about 1221.3304291616.

The spelling of 1821795113 in words is "one billion, eight hundred twenty-one million, seven hundred ninety-five thousand, one hundred thirteen".