921085929 has 24 divisors (see below), whose sum is σ = 1363602240. Its totient is φ = 598806432.

The previous prime is 921085927. The next prime is 921085969. The reversal of 921085929 is 929580129.

It is not a de Polignac number, because 921085929 - 2¹ = 921085927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (921085927) 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 23 ways as a sum of consecutive naturals, for example, 297612 + ... + 300690.

It is an arithmetic number, because the mean of its divisors is an integer number (56816760).

Almost surely, 2^921085929 is an apocalyptic number.

It is an amenable number.

921085929 is a deficient number, since it is larger than the sum of its proper divisors (442516311).

921085929 is a wasteful number, since it uses less digits than its factorization.

921085929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901 (or 3898 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 921085929 is about 30349.3975063756. The cubic root of 921085929 is about 972.9713432964.

The spelling of 921085929 in words is "nine hundred twenty-one million, eighty-five thousand, nine hundred twenty-nine".