969999 has 4 divisors (see below), whose sum is σ = 1293336. Its totient is φ = 646664.

The previous prime is 969989. The next prime is 970027. The reversal of 969999 is 999969.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999969 = 3 ⋅333323.

It is a cyclic number.

It is not a de Polignac number, because 969999 - 2⁸ = 969743 is a prime.

It is a D-number.

969999 is a modest number, since divided by 999 gives 969 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969919) 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, 161664 + ... + 161669.

It is an arithmetic number, because the mean of its divisors is an integer number (323334).

2⁹⁶⁹⁹⁹⁹ is an apocalyptic number.

969999 is a deficient number, since it is larger than the sum of its proper divisors (323337).

969999 is a wasteful number, since it uses less digits than its factorization.

969999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323336.

The product of its digits is 354294, while the sum is 51.

The square root of 969999 is about 984.8852725064. The cubic root of 969999 is about 98.9897959078.

The spelling of 969999 in words is "nine hundred sixty-nine thousand, nine hundred ninety-nine".