123696531 has 24 divisors (see below), whose sum is σ = 213175440. Its totient is φ = 70682976.

The previous prime is 123696523. The next prime is 123696533. The reversal of 123696531 is 135696321.

123696531 is a `hidden beast` number, since 1 + 2 + 36 + 96 + 531 = 666.

It is not a de Polignac number, because 123696531 - 2³ = 123696523 is a prime.

It is a super-3 number, since 3×123696531³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (123696533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45426 + ... + 48071.

It is an arithmetic number, because the mean of its divisors is an integer number (8882310).

Almost surely, 2^123696531 is an apocalyptic number.

123696531 is a deficient number, since it is larger than the sum of its proper divisors (89478909).

123696531 is an equidigital number, since it uses as much as digits as its factorization.

123696531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93520 (or 93507 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 123696531 is about 11121.8942181627. The cubic root of 123696531 is about 498.2559650908.

The spelling of 123696531 in words is "one hundred twenty-three million, six hundred ninety-six thousand, five hundred thirty-one".