1364361821 has 2 divisors, whose sum is σ = 1364361822. Its totient is φ = 1364361820.

The previous prime is 1364361799. The next prime is 1364361827. The reversal of 1364361821 is 1281634631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081752100 + 282609721 = 32890^2 + 16811^2 .

It is an emirp because it is prime and its reverse (1281634631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1364361821 - 2¹⁸ = 1364099677 is a prime.

It is a super-2 number, since 2×1364361821² = 3722966357204872082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1364361827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682180910 + 682180911.

It is an arithmetic number, because the mean of its divisors is an integer number (682180911).

Almost surely, 2^1364361821 is an apocalyptic number.

It is an amenable number.

1364361821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1364361821 is an equidigital number, since it uses as much as digits as its factorization.

1364361821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 1364361821 is about 36937.2687268563. The cubic root of 1364361821 is about 1109.1148479989.

The spelling of 1364361821 in words is "one billion, three hundred sixty-four million, three hundred sixty-one thousand, eight hundred twenty-one".