855507123 has 16 divisors (see below), whose sum is σ = 1268265600. Its totient is φ = 569956680.

The previous prime is 855507109. The next prime is 855507137. The reversal of 855507123 is 321705558.

855507123 is a `hidden beast` number, since 85 + 550 + 7 + 1 + 23 = 666.

855507123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (855507109) and next prime (855507137).

It is not a de Polignac number, because 855507123 - 2¹⁴ = 855490739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855507143) 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, 33928 + ... + 53498.

It is an arithmetic number, because the mean of its divisors is an integer number (79266600).

Almost surely, 2^855507123 is an apocalyptic number.

855507123 is a deficient number, since it is larger than the sum of its proper divisors (412758477).

855507123 is a wasteful number, since it uses less digits than its factorization.

855507123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21199 (or 21193 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 855507123 is about 29249.0533692973. The cubic root of 855507123 is about 949.3096084594.

The spelling of 855507123 in words is "eight hundred fifty-five million, five hundred seven thousand, one hundred twenty-three".