123155433 has 6 divisors (see below), whose sum is σ = 177891194. Its totient is φ = 82103616.

The previous prime is 123155419. The next prime is 123155437. The reversal of 123155433 is 334551321.

It can be written as a sum of positive squares in only one way, i.e., 73410624 + 49744809 = 8568^2 + 7053^2 .

It is not a de Polignac number, because 123155433 - 2⁹ = 123154921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123155397 and 123155406.

It is not an unprimeable number, because it can be changed into a prime (123155437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6841960 + ... + 6841977.

Almost surely, 2^123155433 is an apocalyptic number.

It is an amenable number.

123155433 is a deficient number, since it is larger than the sum of its proper divisors (54735761).

123155433 is a wasteful number, since it uses less digits than its factorization.

123155433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13683943 (or 13683940 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 123155433 is about 11097.5417548212. The cubic root of 123155433 is about 497.5283796509.

The spelling of 123155433 in words is "one hundred twenty-three million, one hundred fifty-five thousand, four hundred thirty-three".