1288996723 has 8 divisors (see below), whose sum is σ = 1490888448. Its totient is φ = 1091542344.

The previous prime is 1288996717. The next prime is 1288996733. The reversal of 1288996723 is 3276998821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1288996723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1288996733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1108711 + ... + 1109872.

It is an arithmetic number, because the mean of its divisors is an integer number (186361056).

Almost surely, 2^1288996723 is an apocalyptic number.

1288996723 is a deficient number, since it is larger than the sum of its proper divisors (201891725).

1288996723 is an equidigital number, since it uses as much as digits as its factorization.

1288996723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218673.

The product of its digits is 2612736, while the sum is 55.

The square root of 1288996723 is about 35902.6005046988. The cubic root of 1288996723 is about 1088.3049497859.

The spelling of 1288996723 in words is "one billion, two hundred eighty-eight million, nine hundred ninety-six thousand, seven hundred twenty-three".