123031507 has 4 divisors (see below), whose sum is σ = 123079320. Its totient is φ = 122983696.

The previous prime is 123031501. The next prime is 123031511. The reversal of 123031507 is 705130321.

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 123031507 - 2⁷ = 123031379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123031501) 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 3 ways as a sum of consecutive naturals, for example, 19813 + ... + 25270.

It is an arithmetic number, because the mean of its divisors is an integer number (30769830).

Almost surely, 2^123031507 is an apocalyptic number.

123031507 is a deficient number, since it is larger than the sum of its proper divisors (47813).

123031507 is an equidigital number, since it uses as much as digits as its factorization.

123031507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47812.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 123031507 is about 11091.9568607167. The cubic root of 123031507 is about 497.3614431954.

Adding to 123031507 its reverse (705130321), we get a palindrome (828161828).

The spelling of 123031507 in words is "one hundred twenty-three million, thirty-one thousand, five hundred seven".