999746969 has 4 divisors (see below), whose sum is σ = 1076650596. Its totient is φ = 922843344.

The previous prime is 999746963. The next prime is 999746981. The reversal of 999746969 is 969647999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969647999 = 887 ⋅1093177.

It can be written as a sum of positive squares in 2 ways, for example, as 249260944 + 750486025 = 15788^2 + 27395^2 .

It is a cyclic number.

It is not a de Polignac number, because 999746969 - 2²⁸ = 731311513 is a prime.

It is a super-2 number, since 2×999746969² = 1998988004049373922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999746899 and 999746908.

It is not an unprimeable number, because it can be changed into a prime (999746963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38451794 + ... + 38451819.

It is an arithmetic number, because the mean of its divisors is an integer number (269162649).

Almost surely, 2^999746969 is an apocalyptic number.

It is an amenable number.

999746969 is a deficient number, since it is larger than the sum of its proper divisors (76903627).

999746969 is a wasteful number, since it uses less digits than its factorization.

999746969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76903626.

The product of its digits is 59521392, while the sum is 68.

The square root of 999746969 is about 31618.7755771788. The cubic root of 999746969 is about 999.9156492185.

The spelling of 999746969 in words is "nine hundred ninety-nine million, seven hundred forty-six thousand, nine hundred sixty-nine".