123342631 has 4 divisors (see below), whose sum is σ = 124024264. Its totient is φ = 122661000.

The previous prime is 123342587. The next prime is 123342649. The reversal of 123342631 is 136243321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123342631 - 2⁷ = 123342503 is a prime.

It is a super-2 number, since 2×123342631² = 30426809244004322, 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 = 123342596 and 123342605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123342931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340545 + ... + 340906.

It is an arithmetic number, because the mean of its divisors is an integer number (31006066).

Almost surely, 2^123342631 is an apocalyptic number.

123342631 is a deficient number, since it is larger than the sum of its proper divisors (681633).

123342631 is an equidigital number, since it uses as much as digits as its factorization.

123342631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681632.

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

The square root of 123342631 is about 11105.9727624373. The cubic root of 123342631 is about 497.7803354265.

Adding to 123342631 its reverse (136243321), we get a palindrome (259585952).

The spelling of 123342631 in words is "one hundred twenty-three million, three hundred forty-two thousand, six hundred thirty-one".