123864609 has 16 divisors (see below), whose sum is σ = 180359424. Its totient is φ = 74989200.

The previous prime is 123864589. The next prime is 123864613. The reversal of 123864609 is 906468321.

It is not a de Polignac number, because 123864609 - 2⁸ = 123864353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123864409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47674 + ... + 50204.

It is an arithmetic number, because the mean of its divisors is an integer number (11272464).

Almost surely, 2^123864609 is an apocalyptic number.

It is an amenable number.

123864609 is a deficient number, since it is larger than the sum of its proper divisors (56494815).

123864609 is a wasteful number, since it uses less digits than its factorization.

123864609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 123864609 is about 11129.4478299689. The cubic root of 123864609 is about 498.4815385512.

The spelling of 123864609 in words is "one hundred twenty-three million, eight hundred sixty-four thousand, six hundred nine".