1361943377 has 2 divisors, whose sum is σ = 1361943378. Its totient is φ = 1361943376.

The previous prime is 1361943361. The next prime is 1361943383. The reversal of 1361943377 is 7733491631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1090056256 + 271887121 = 33016^2 + 16489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361943377 - 2⁴ = 1361943361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361943577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680971688 + 680971689.

It is an arithmetic number, because the mean of its divisors is an integer number (680971689).

Almost surely, 2^1361943377 is an apocalyptic number.

It is an amenable number.

1361943377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361943377 is an equidigital number, since it uses as much as digits as its factorization.

1361943377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 44.

The square root of 1361943377 is about 36904.5170270524. The cubic root of 1361943377 is about 1108.4591278529.

The spelling of 1361943377 in words is "one billion, three hundred sixty-one million, nine hundred forty-three thousand, three hundred seventy-seven".