123155653 has 8 divisors (see below), whose sum is σ = 127895040. Its totient is φ = 118464240.

The previous prime is 123155629. The next prime is 123155693. The reversal of 123155653 is 356551321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123155653 - 2¹⁷ = 123024581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123155693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6718 + ... + 17071.

It is an arithmetic number, because the mean of its divisors is an integer number (15986880).

Almost surely, 2^123155653 is an apocalyptic number.

It is an amenable number.

123155653 is a deficient number, since it is larger than the sum of its proper divisors (4739387).

123155653 is a wasteful number, since it uses less digits than its factorization.

123155653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23987.

The product of its digits is 13500, while the sum is 31.

The square root of 123155653 is about 11097.5516669219. The cubic root of 123155653 is about 497.5286759057.

The spelling of 123155653 in words is "one hundred twenty-three million, one hundred fifty-five thousand, six hundred fifty-three".