1363798985 has 8 divisors (see below), whose sum is σ = 1641723336. Its totient is φ = 1087596160.

The previous prime is 1363798957. The next prime is 1363798991. The reversal of 1363798985 is 5898973631.

It can be written as a sum of positive squares in 4 ways, for example, as 121801 + 1363677184 = 349^2 + 36928^2 .

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

It is not a de Polignac number, because 1363798985 - 2⁸ = 1363798729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428636 + ... + 431805.

It is an arithmetic number, because the mean of its divisors is an integer number (205215417).

Almost surely, 2^1363798985 is an apocalyptic number.

It is an amenable number.

1363798985 is a deficient number, since it is larger than the sum of its proper divisors (277924351).

1363798985 is an equidigital number, since it uses as much as digits as its factorization.

1363798985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860763.

The product of its digits is 9797760, while the sum is 59.

The square root of 1363798985 is about 36929.6491318290. The cubic root of 1363798985 is about 1108.9623137726.

The spelling of 1363798985 in words is "one billion, three hundred sixty-three million, seven hundred ninety-eight thousand, nine hundred eighty-five".