922085721 has 8 divisors (see below), whose sum is σ = 1366052960. Its totient is φ = 614723796.

The previous prime is 922085687. The next prime is 922085737. The reversal of 922085721 is 127580229.

It is not a de Polignac number, because 922085721 - 2¹⁸ = 921823577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (922080721) 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 7 ways as a sum of consecutive naturals, for example, 17075635 + ... + 17075688.

It is an arithmetic number, because the mean of its divisors is an integer number (170756620).

Almost surely, 2^922085721 is an apocalyptic number.

It is an amenable number.

922085721 is a deficient number, since it is larger than the sum of its proper divisors (443967239).

922085721 is a wasteful number, since it uses less digits than its factorization.

922085721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34151332 (or 34151326 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 922085721 is about 30365.8644039652. The cubic root of 922085721 is about 973.3232529945.

The spelling of 922085721 in words is "nine hundred twenty-two million, eighty-five thousand, seven hundred twenty-one".