999688747 has 2 divisors, whose sum is σ = 999688748. Its totient is φ = 999688746.

The previous prime is 999688741. The next prime is 999688759. The reversal of 999688747 is 747886999.

999688747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999688747 - 2⁷ = 999688619 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999688741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499844373 + 499844374.

It is an arithmetic number, because the mean of its divisors is an integer number (499844374).

Almost surely, 2^999688747 is an apocalyptic number.

999688747 is a deficient number, since it is larger than the sum of its proper divisors (1).

999688747 is an equidigital number, since it uses as much as digits as its factorization.

999688747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54867456, while the sum is 67.

The square root of 999688747 is about 31617.8548766358. The cubic root of 999688747 is about 999.8962382339.

The spelling of 999688747 in words is "nine hundred ninety-nine million, six hundred eighty-eight thousand, seven hundred forty-seven".