123030631 has 4 divisors (see below), whose sum is σ = 125648352. Its totient is φ = 120412912.

The previous prime is 123030619. The next prime is 123030653. The reversal of 123030631 is 136030321.

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 123030631 - 2¹⁷ = 122899559 is a prime.

It is a super-2 number, since 2×123030631² = 30273072328516322, 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 = 123030599 and 123030608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123030431) 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, 1308790 + ... + 1308883.

It is an arithmetic number, because the mean of its divisors is an integer number (31412088).

Almost surely, 2^123030631 is an apocalyptic number.

123030631 is a deficient number, since it is larger than the sum of its proper divisors (2617721).

123030631 is an equidigital number, since it uses as much as digits as its factorization.

123030631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617720.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 123030631 is about 11091.9173725736. The cubic root of 123030631 is about 497.3602627670.

Adding to 123030631 its reverse (136030321), we get a palindrome (259060952).

The spelling of 123030631 in words is "one hundred twenty-three million, thirty thousand, six hundred thirty-one".