1288993039 has 4 divisors (see below), whose sum is σ = 1289149056. Its totient is φ = 1288837024.

The previous prime is 1288993021. The next prime is 1288993063. The reversal of 1288993039 is 9303998821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9303998821 = 13 ⋅715692217.

It is a cyclic number.

It is not a de Polignac number, because 1288993039 - 2⁷ = 1288992911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288993639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64879 + ... + 82384.

It is an arithmetic number, because the mean of its divisors is an integer number (322287264).

Almost surely, 2^1288993039 is an apocalyptic number.

1288993039 is a deficient number, since it is larger than the sum of its proper divisors (156017).

1288993039 is an equidigital number, since it uses as much as digits as its factorization.

1288993039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156016.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 1288993039 is about 35902.5491991864. The cubic root of 1288993039 is about 1088.3039129797.

The spelling of 1288993039 in words is "one billion, two hundred eighty-eight million, nine hundred ninety-three thousand, thirty-nine".