123319915 has 16 divisors (see below), whose sum is σ = 151826400. Its totient is φ = 96106752.

The previous prime is 123319909. The next prime is 123319957. The reversal of 123319915 is 519913321.

It is a cyclic number.

It is not a de Polignac number, because 123319915 - 2¹⁵ = 123287147 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 152031 + ... + 152839.

It is an arithmetic number, because the mean of its divisors is an integer number (9489150).

Almost surely, 2^123319915 is an apocalyptic number.

123319915 is a deficient number, since it is larger than the sum of its proper divisors (28506485).

123319915 is an equidigital number, since it uses as much as digits as its factorization.

123319915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566.

The product of its digits is 7290, while the sum is 34.

The square root of 123319915 is about 11104.9500223999. The cubic root of 123319915 is about 497.7497748321.

The spelling of 123319915 in words is "one hundred twenty-three million, three hundred nineteen thousand, nine hundred fifteen".