123618853 has 4 divisors (see below), whose sum is σ = 123669900. Its totient is φ = 123567808.

The previous prime is 123618823. The next prime is 123618871. The reversal of 123618853 is 358816321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 358816321 = 71 ⋅5053751.

It can be written as a sum of positive squares in 2 ways, for example, as 69772609 + 53846244 = 8353^2 + 7338^2 .

It is a cyclic number.

It is not a de Polignac number, because 123618853 - 2¹³ = 123610661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123618823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21700 + ... + 26797.

It is an arithmetic number, because the mean of its divisors is an integer number (30917475).

Almost surely, 2^123618853 is an apocalyptic number.

It is an amenable number.

123618853 is a deficient number, since it is larger than the sum of its proper divisors (51047).

123618853 is an equidigital number, since it uses as much as digits as its factorization.

123618853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51046.

The product of its digits is 34560, while the sum is 37.

The square root of 123618853 is about 11118.4015487839. The cubic root of 123618853 is about 498.1516462632.

The spelling of 123618853 in words is "one hundred twenty-three million, six hundred eighteen thousand, eight hundred fifty-three".