999768723 has 12 divisors (see below), whose sum is σ = 1366016904. Its totient is φ = 650028000.

The previous prime is 999768703. The next prime is 999768767. The reversal of 999768723 is 327867999.

It is a de Polignac number, because none of the positive numbers 2^k-999768723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999768703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349248 + ... + 352098.

It is an arithmetic number, because the mean of its divisors is an integer number (113834742).

Almost surely, 2^999768723 is an apocalyptic number.

999768723 is a deficient number, since it is larger than the sum of its proper divisors (366248181).

999768723 is an frugal number, since it uses more digits than its factorization.

999768723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5746 (or 2895 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 60.

The square root of 999768723 is about 31619.1195797732. The cubic root of 999768723 is about 999.9229017227.

The spelling of 999768723 in words is "nine hundred ninety-nine million, seven hundred sixty-eight thousand, seven hundred twenty-three".