123243631 has 8 divisors (see below), whose sum is σ = 145393664. Its totient is φ = 102229560.

The previous prime is 123243613. The next prime is 123243667. The reversal of 123243631 is 136342321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123243631 - 2⁷ = 123243503 is a prime.

It is a super-2 number, since 2×123243631² = 30377985164128322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123243596 and 123243605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283755 + ... + 284188.

It is an arithmetic number, because the mean of its divisors is an integer number (18174208).

Almost surely, 2^123243631 is an apocalyptic number.

123243631 is a deficient number, since it is larger than the sum of its proper divisors (22150033).

123243631 is an equidigital number, since it uses as much as digits as its factorization.

123243631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567981.

The product of its digits is 2592, while the sum is 25.

The square root of 123243631 is about 11101.5148065478. The cubic root of 123243631 is about 497.6471199451.

Adding to 123243631 its reverse (136342321), we get a palindrome (259585952).

The spelling of 123243631 in words is "one hundred twenty-three million, two hundred forty-three thousand, six hundred thirty-one".