1361239169 has 2 divisors, whose sum is σ = 1361239170. Its totient is φ = 1361239168.

The previous prime is 1361239151. The next prime is 1361239189. The reversal of 1361239169 is 9619321631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954006769 + 407232400 = 30887^2 + 20180^2 .

It is an emirp because it is prime and its reverse (9619321631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1361239169 - 2¹⁶ = 1361173633 is a prime.

It is a super-2 number, since 2×1361239169² = 3705944150439621122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1361239189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680619584 + 680619585.

It is an arithmetic number, because the mean of its divisors is an integer number (680619585).

Almost surely, 2^1361239169 is an apocalyptic number.

It is an amenable number.

1361239169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361239169 is an equidigital number, since it uses as much as digits as its factorization.

1361239169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 1361239169 is about 36894.9748475317. The cubic root of 1361239169 is about 1108.2680478677.

The spelling of 1361239169 in words is "one billion, three hundred sixty-one million, two hundred thirty-nine thousand, one hundred sixty-nine".