912920383921 has 32 divisors (see below), whose sum is σ = 1187228528640. Its totient is φ = 681692065344.

The previous prime is 912920383897. The next prime is 912920383939. The reversal of 912920383921 is 129383029219.

It is a cyclic number.

It is not a de Polignac number, because 912920383921 - 2⁵ = 912920383889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (912920383121) 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 31 ways as a sum of consecutive naturals, for example, 549085 + ... + 1458538.

It is an arithmetic number, because the mean of its divisors is an integer number (37100891520).

Almost surely, 2^912920383921 is an apocalyptic number.

912920383921 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

912920383921 is a deficient number, since it is larger than the sum of its proper divisors (274308144719).

912920383921 is a wasteful number, since it uses less digits than its factorization.

912920383921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007925.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 912920383921 in words is "nine hundred twelve billion, nine hundred twenty million, three hundred eighty-three thousand, nine hundred twenty-one".