123531863 has 32 divisors (see below), whose sum is σ = 164451840. Its totient is φ = 90046080.

The previous prime is 123531857. The next prime is 123531871. The reversal of 123531863 is 368135321.

It is a cyclic number.

It is not a de Polignac number, because 123531863 - 2⁴ = 123531847 is a prime.

It is a super-3 number, since 3×123531863³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123531823) 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 31 ways as a sum of consecutive naturals, for example, 63008 + ... + 64938.

It is an arithmetic number, because the mean of its divisors is an integer number (5139120).

Almost surely, 2^123531863 is an apocalyptic number.

123531863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123531863 is a deficient number, since it is larger than the sum of its proper divisors (40919977).

123531863 is a wasteful number, since it uses less digits than its factorization.

123531863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its digits is 12960, while the sum is 32.

The square root of 123531863 is about 11114.4888771369. The cubic root of 123531863 is about 498.0347698610.

The spelling of 123531863 in words is "one hundred twenty-three million, five hundred thirty-one thousand, eight hundred sixty-three".