123649413 has 4 divisors (see below), whose sum is σ = 164865888. Its totient is φ = 82432940.

The previous prime is 123649387. The next prime is 123649423. The reversal of 123649413 is 314946321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123649413 - 2⁶ = 123649349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123649423) 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 3 ways as a sum of consecutive naturals, for example, 20608233 + ... + 20608238.

It is an arithmetic number, because the mean of its divisors is an integer number (41216472).

Almost surely, 2^123649413 is an apocalyptic number.

It is an amenable number.

123649413 is a deficient number, since it is larger than the sum of its proper divisors (41216475).

123649413 is an equidigital number, since it uses as much as digits as its factorization.

123649413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41216474.

The product of its digits is 15552, while the sum is 33.

The square root of 123649413 is about 11119.7757621276. The cubic root of 123649413 is about 498.1926924835.

The spelling of 123649413 in words is "one hundred twenty-three million, six hundred forty-nine thousand, four hundred thirteen".