123609351 has 4 divisors (see below), whose sum is σ = 164812472. Its totient is φ = 82406232.

The previous prime is 123609347. The next prime is 123609361. The reversal of 123609351 is 153906321.

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

It is not a de Polignac number, because 123609351 - 2² = 123609347 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 (123609361) 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, 20601556 + ... + 20601561.

It is an arithmetic number, because the mean of its divisors is an integer number (41203118).

Almost surely, 2^123609351 is an apocalyptic number.

123609351 is a deficient number, since it is larger than the sum of its proper divisors (41203121).

123609351 is an equidigital number, since it uses as much as digits as its factorization.

123609351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41203120.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 123609351 is about 11117.9742309469. The cubic root of 123609351 is about 498.1388824113.

The spelling of 123609351 in words is "one hundred twenty-three million, six hundred nine thousand, three hundred fifty-one".