123420099 has 16 divisors (see below), whose sum is σ = 180520704. Its totient is φ = 74383200.

The previous prime is 123420071. The next prime is 123420137. The reversal of 123420099 is 990024321.

It is not a de Polignac number, because 123420099 - 2⁷ = 123419971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123420299) 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 15 ways as a sum of consecutive naturals, for example, 4359 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (11282544).

Almost surely, 2^123420099 is an apocalyptic number.

123420099 is a deficient number, since it is larger than the sum of its proper divisors (57100605).

123420099 is a wasteful number, since it uses less digits than its factorization.

123420099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20858.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 123420099 is about 11109.4598878613. The cubic root of 123420099 is about 497.8845275086.

The spelling of 123420099 in words is "one hundred twenty-three million, four hundred twenty thousand, ninety-nine".