921148109 has 16 divisors (see below), whose sum is σ = 1094515200. Its totient is φ = 774642960.

The previous prime is 921148103. The next prime is 921148117. The reversal of 921148109 is 901841129.

It is not a de Polignac number, because 921148109 - 2¹⁶ = 921082573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921148103) 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 15 ways as a sum of consecutive naturals, for example, 7157 + ... + 43514.

It is an arithmetic number, because the mean of its divisors is an integer number (68407200).

Almost surely, 2^921148109 is an apocalyptic number.

It is an amenable number.

921148109 is a deficient number, since it is larger than the sum of its proper divisors (173367091).

921148109 is an equidigital number, since it uses as much as digits as its factorization.

921148109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50745 (or 50731 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 921148109 is about 30350.4218916311. The cubic root of 921148109 is about 972.9932370180.

The spelling of 921148109 in words is "nine hundred twenty-one million, one hundred forty-eight thousand, one hundred nine".