1361943899 has 8 divisors (see below), whose sum is σ = 1444525488. Its totient is φ = 1279636480.

The previous prime is 1361943881. The next prime is 1361943917. The reversal of 1361943899 is 9983491631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1361943881) and next prime (1361943917).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1361943899 - 2²⁰ = 1360895323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1361943899.

It is not an unprimeable number, because it can be changed into a prime (1361945899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58262 + ... + 78219.

It is an arithmetic number, because the mean of its divisors is an integer number (180565686).

Almost surely, 2^1361943899 is an apocalyptic number.

1361943899 is a deficient number, since it is larger than the sum of its proper divisors (82581589).

1361943899 is a wasteful number, since it uses less digits than its factorization.

1361943899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137085.

The product of its digits is 1259712, while the sum is 53.

The square root of 1361943899 is about 36904.5240993567. The cubic root of 1361943899 is about 1108.4592694681.

The spelling of 1361943899 in words is "one billion, three hundred sixty-one million, nine hundred forty-three thousand, eight hundred ninety-nine".