1027999999 has 8 divisors (see below), whose sum is σ = 1125226592. Its totient is φ = 933366240.

The previous prime is 1027999993. The next prime is 1028000023. The reversal of 1027999999 is 9999997201.

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 1027999999 - 2⁵ = 1027999967 is a prime.

It is a Duffinian number.

1027999999 is a modest number, since divided by 99999 gives 10279 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1027999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1027999993) 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, 647379 + ... + 648964.

It is an arithmetic number, because the mean of its divisors is an integer number (140653324).

Almost surely, 2^1027999999 is an apocalyptic number.

1027999999 is a deficient number, since it is larger than the sum of its proper divisors (97226593).

1027999999 is a wasteful number, since it uses less digits than its factorization.

1027999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296417.

The product of its (nonzero) digits is 7440174, while the sum is 64.

The square root of 1027999999 is about 32062.4390681682. The cubic root of 1027999999 is about 1009.2475521705.

It can be divided in two parts, 102799 and 9999, that multiplied together give a palindrome (1027887201).

The spelling of 1027999999 in words is "one billion, twenty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".