999764 has 12 divisors (see below), whose sum is σ = 1825824. Its totient is φ = 478104.

The previous prime is 999763. The next prime is 999769. The reversal of 999764 is 467999.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999763) 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, 5342 + ... + 5525.

It is an arithmetic number, because the mean of its divisors is an integer number (152152).

2⁹⁹⁹⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

999764 is a deficient number, since it is larger than the sum of its proper divisors (826060).

999764 is a wasteful number, since it uses less digits than its factorization.

999764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10894 (or 10892 counting only the distinct ones).

The product of its digits is 122472, while the sum is 44.

The square root of 999764 is about 999.8819930372. The cubic root of 999764 is about 99.9921327144.

The spelling of 999764 in words is "nine hundred ninety-nine thousand, seven hundred sixty-four".