920812123 has 16 divisors (see below), whose sum is σ = 1215558144. Its totient is φ = 675308160.

The previous prime is 920812121. The next prime is 920812169. The reversal of 920812123 is 321218029.

It is a cyclic number.

It is not a de Polignac number, because 920812123 - 2¹ = 920812121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 920812091 and 920812100.

It is not an unprimeable number, because it can be changed into a prime (920812121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350415 + ... + 353032.

It is an arithmetic number, because the mean of its divisors is an integer number (75972384).

Almost surely, 2^920812123 is an apocalyptic number.

920812123 is a deficient number, since it is larger than the sum of its proper divisors (294746021).

920812123 is a wasteful number, since it uses less digits than its factorization.

920812123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703482.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 920812123 is about 30344.8862742967. The cubic root of 920812123 is about 972.8749238473.

The spelling of 920812123 in words is "nine hundred twenty million, eight hundred twelve thousand, one hundred twenty-three".