123607999 has 4 divisors (see below), whose sum is σ = 125097336. Its totient is φ = 122118664.

The previous prime is 123607987. The next prime is 123608027. The reversal of 123607999 is 999706321.

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 123607999 - 2¹⁹ = 123083711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123607909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744544 + ... + 744709.

It is an arithmetic number, because the mean of its divisors is an integer number (31274334).

Almost surely, 2^123607999 is an apocalyptic number.

123607999 is a deficient number, since it is larger than the sum of its proper divisors (1489337).

123607999 is an equidigital number, since it uses as much as digits as its factorization.

123607999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489336.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 123607999 is about 11117.9134283372. The cubic root of 123607999 is about 498.1370662428.

The spelling of 123607999 in words is "one hundred twenty-three million, six hundred seven thousand, nine hundred ninety-nine".