921921093 has 12 divisors (see below), whose sum is σ = 1331972928. Its totient is φ = 614471400.

The previous prime is 921921083. The next prime is 921921103. The reversal of 921921093 is 390129129.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (921921083) and next prime (921921103).

It is not a de Polignac number, because 921921093 - 2⁸ = 921920837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921921083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41796 + ... + 59922.

It is an arithmetic number, because the mean of its divisors is an integer number (110997744).

Almost surely, 2^921921093 is an apocalyptic number.

It is an amenable number.

921921093 is a deficient number, since it is larger than the sum of its proper divisors (410051835).

921921093 is a wasteful number, since it uses less digits than its factorization.

921921093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23784 (or 23781 counting only the distinct ones).

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

The square root of 921921093 is about 30363.1535417519. The cubic root of 921921093 is about 973.2653242525.

The spelling of 921921093 in words is "nine hundred twenty-one million, nine hundred twenty-one thousand, ninety-three".