1361644069 has 2 divisors, whose sum is σ = 1361644070. Its totient is φ = 1361644068.

The previous prime is 1361644043. The next prime is 1361644129. The reversal of 1361644069 is 9604461631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1160287969 + 201356100 = 34063^2 + 14190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361644069 - 2¹⁵ = 1361611301 is a prime.

It is a super-2 number, since 2×1361644069² = 3708149141285753522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361644369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680822034 + 680822035.

It is an arithmetic number, because the mean of its divisors is an integer number (680822035).

Almost surely, 2^1361644069 is an apocalyptic number.

It is an amenable number.

1361644069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361644069 is an equidigital number, since it uses as much as digits as its factorization.

1361644069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 1361644069 is about 36900.4616366787. The cubic root of 1361644069 is about 1108.3779215911.

The spelling of 1361644069 in words is "one billion, three hundred sixty-one million, six hundred forty-four thousand, sixty-nine".