1368999869 has 4 divisors (see below), whose sum is σ = 1384381980. Its totient is φ = 1353617760.

The previous prime is 1368999787. The next prime is 1368999871. The reversal of 1368999869 is 9689998631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103774969 + 1265224900 = 10187^2 + 35570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1368999869 is a prime.

It is a super-2 number, since 2×1368999869² = 3748321282644034322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1368999799 and 1368999808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368992869) 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 3 ways as a sum of consecutive naturals, for example, 7690922 + ... + 7691099.

It is an arithmetic number, because the mean of its divisors is an integer number (346095495).

Almost surely, 2^1368999869 is an apocalyptic number.

It is an amenable number.

1368999869 is a deficient number, since it is larger than the sum of its proper divisors (15382111).

1368999869 is an equidigital number, since it uses as much as digits as its factorization.

1368999869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15382110.

The product of its digits is 45349632, while the sum is 68.

The square root of 1368999869 is about 36999.9982297297. The cubic root of 1368999869 is about 1110.3702114415.

The spelling of 1368999869 in words is "one billion, three hundred sixty-eight million, nine hundred ninety-nine thousand, eight hundred sixty-nine".