123423631 has 8 divisors (see below), whose sum is σ = 128075904. Its totient is φ = 118852440.

The previous prime is 123423607. The next prime is 123423637. The reversal of 123423631 is 136324321.

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 123423631 - 2⁹ = 123423119 is a prime.

It is a super-2 number, since 2×123423631² = 30466785378448322, 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 = 123423596 and 123423605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123423637) 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 7 ways as a sum of consecutive naturals, for example, 17161 + ... + 23266.

It is an arithmetic number, because the mean of its divisors is an integer number (16009488).

Almost surely, 2^123423631 is an apocalyptic number.

123423631 is a deficient number, since it is larger than the sum of its proper divisors (4652273).

123423631 is an equidigital number, since it uses as much as digits as its factorization.

123423631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40541.

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

The square root of 123423631 is about 11109.6188503477. The cubic root of 123423631 is about 497.8892769008.

Adding to 123423631 its reverse (136324321), we get a palindrome (259747952).

The spelling of 123423631 in words is "one hundred twenty-three million, four hundred twenty-three thousand, six hundred thirty-one".