921916 has 6 divisors (see below), whose sum is σ = 1613360. Its totient is φ = 460956.

The previous prime is 921913. The next prime is 921919. The reversal of 921916 is 619129.

921916 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (921913) and next prime (921919).

It is a super-2 number, since 2×921916² = 1699858222112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115236 + ... + 115243.

2⁹²¹⁹¹⁶ is an apocalyptic number.

It is an amenable number.

921916 is a deficient number, since it is larger than the sum of its proper divisors (691444).

921916 is a wasteful number, since it uses less digits than its factorization.

921916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230483 (or 230481 counting only the distinct ones).

The product of its digits is 972, while the sum is 28.

The square root of 921916 is about 960.1645692276. The cubic root of 921916 is about 97.3263532035.

The spelling of 921916 in words is "nine hundred twenty-one thousand, nine hundred sixteen".