123904535 has 4 divisors (see below), whose sum is σ = 148685448. Its totient is φ = 99123624.

The previous prime is 123904523. The next prime is 123904537. The reversal of 123904535 is 535409321.

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 123904535 - 2⁶ = 123904471 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 (123904537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12390449 + ... + 12390458.

It is an arithmetic number, because the mean of its divisors is an integer number (37171362).

Almost surely, 2^123904535 is an apocalyptic number.

123904535 is a deficient number, since it is larger than the sum of its proper divisors (24780913).

123904535 is an equidigital number, since it uses as much as digits as its factorization.

123904535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24780912.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 123904535 is about 11131.2413952802. The cubic root of 123904535 is about 498.5350922823.

The spelling of 123904535 in words is "one hundred twenty-three million, nine hundred four thousand, five hundred thirty-five".