123643355 has 32 divisors (see below), whose sum is σ = 171590400. Its totient is φ = 84585600.

The previous prime is 123643343. The next prime is 123643367. The reversal of 123643355 is 553346321.

It is an interprime number because it is at equal distance from previous prime (123643343) and next prime (123643367).

It is not a de Polignac number, because 123643355 - 2⁸ = 123643099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186725 + ... + 187385.

It is an arithmetic number, because the mean of its divisors is an integer number (5362200).

Almost surely, 2^123643355 is an apocalyptic number.

123643355 is a deficient number, since it is larger than the sum of its proper divisors (47947045).

123643355 is a wasteful number, since it uses less digits than its factorization.

123643355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875.

The product of its digits is 32400, while the sum is 32.

The square root of 123643355 is about 11119.5033612118. The cubic root of 123643355 is about 498.1845563063.

Adding to 123643355 its reverse (553346321), we get a palindrome (676989676).

The spelling of 123643355 in words is "one hundred twenty-three million, six hundred forty-three thousand, three hundred fifty-five".