123521339 has 8 divisors (see below), whose sum is σ = 129116832. Its totient is φ = 117944640.

The previous prime is 123521309. The next prime is 123521357. The reversal of 123521339 is 933125321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123521339 - 2¹⁶ = 123455803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123521309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9719 + ... + 18479.

It is an arithmetic number, because the mean of its divisors is an integer number (16139604).

Almost surely, 2^123521339 is an apocalyptic number.

123521339 is a deficient number, since it is larger than the sum of its proper divisors (5595493).

123521339 is an equidigital number, since it uses as much as digits as its factorization.

123521339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9397.

The product of its digits is 4860, while the sum is 29.

The square root of 123521339 is about 11114.0154309772. The cubic root of 123521339 is about 498.0206265011.

The spelling of 123521339 in words is "one hundred twenty-three million, five hundred twenty-one thousand, three hundred thirty-nine".