123535913 has 4 divisors (see below), whose sum is σ = 124669380. Its totient is φ = 122402448.

The previous prime is 123535883. The next prime is 123535931. The reversal of 123535913 is 319535321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75829264 + 47706649 = 8708^2 + 6907^2 .

It is a cyclic number.

It is not a de Polignac number, because 123535913 - 2¹⁰ = 123534889 is a prime.

It is a super-2 number, since 2×123535913² = 30522243601487138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123535913.

It is not an unprimeable number, because it can be changed into a prime (123535943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566570 + ... + 566787.

It is an arithmetic number, because the mean of its divisors is an integer number (31167345).

Almost surely, 2^123535913 is an apocalyptic number.

It is an amenable number.

123535913 is a deficient number, since it is larger than the sum of its proper divisors (1133467).

123535913 is a wasteful number, since it uses less digits than its factorization.

123535913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133466.

The product of its digits is 12150, while the sum is 32.

The square root of 123535913 is about 11114.6710702566. The cubic root of 123535913 is about 498.0402125020.

The spelling of 123535913 in words is "one hundred twenty-three million, five hundred thirty-five thousand, nine hundred thirteen".