1368999999 has 24 divisors (see below), whose sum is σ = 1998826752. Its totient is φ = 902851920.

The previous prime is 1368999979. The next prime is 1369000007. The reversal of 1368999999 is 9999998631.

1368999999 is a `hidden beast` number, since 1 + 368 + 99 + 99 + 99 = 666.

It is a Cunningham number, because it is equal to 37000²-1.

It is not a de Polignac number, because 1368999999 - 2⁷ = 1368999871 is a prime.

1368999999 is a modest number, since divided by 99999 gives 13689 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368999979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330954 + ... + 335064.

It is an arithmetic number, because the mean of its divisors is an integer number (83284448).

Almost surely, 2^1368999999 is an apocalyptic number.

1368999999 is a deficient number, since it is larger than the sum of its proper divisors (629826753).

1368999999 is a wasteful number, since it uses less digits than its factorization.

1368999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507 (or 4504 counting only the distinct ones).

The product of its digits is 76527504, while the sum is 72.

The square root of 1368999999 is about 36999.9999864865. Note that the first 4 decimals coincide. The cubic root of 1368999999 is about 1110.3702465883.

The spelling of 1368999999 in words is "one billion, three hundred sixty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-nine".