921969 has 8 divisors (see below), whose sum is σ = 1365920. Its totient is φ = 614628.

The previous prime is 921959. The next prime is 921989. The reversal of 921969 is 969129.

It is not a de Polignac number, because 921969 - 2⁷ = 921841 is a prime.

It is a super-2 number, since 2×921969² = 1700053673922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17047 + ... + 17100.

It is an arithmetic number, because the mean of its divisors is an integer number (170740).

2⁹²¹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

921969 is a deficient number, since it is larger than the sum of its proper divisors (443951).

921969 is a wasteful number, since it uses less digits than its factorization.

921969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34156 (or 34150 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 921969 is about 960.1921682663. The cubic root of 921969 is about 97.3282182316.

The spelling of 921969 in words is "nine hundred twenty-one thousand, nine hundred sixty-nine".