123779853 has 16 divisors (see below), whose sum is σ = 183576960. Its totient is φ = 82430208.

The previous prime is 123779849. The next prime is 123779863. The reversal of 123779853 is 358977321.

It is a happy number.

It is not a de Polignac number, because 123779853 - 2² = 123779849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123779799 and 123779808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123779833) 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, 30976 + ... + 34742.

It is an arithmetic number, because the mean of its divisors is an integer number (11473560).

Almost surely, 2^123779853 is an apocalyptic number.

It is an amenable number.

123779853 is a deficient number, since it is larger than the sum of its proper divisors (59797107).

123779853 is a wasteful number, since it uses less digits than its factorization.

123779853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4993 (or 4987 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 123779853 is about 11125.6394422972. The cubic root of 123779853 is about 498.3678150757.

The spelling of 123779853 in words is "one hundred twenty-three million, seven hundred seventy-nine thousand, eight hundred fifty-three".