123907345 has 4 divisors (see below), whose sum is σ = 148688820. Its totient is φ = 99125872.

The previous prime is 123907337. The next prime is 123907393. The reversal of 123907345 is 543709321.

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 22924944 + 100982401 = 4788^2 + 10049^2 .

It is a cyclic number.

It is not a de Polignac number, because 123907345 - 2³ = 123907337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123907345.

It is an unprimeable number.

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, 12390730 + ... + 12390739.

It is an arithmetic number, because the mean of its divisors is an integer number (37172205).

Almost surely, 2^123907345 is an apocalyptic number.

It is an amenable number.

123907345 is a deficient number, since it is larger than the sum of its proper divisors (24781475).

123907345 is an equidigital number, since it uses as much as digits as its factorization.

123907345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24781474.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 123907345 is about 11131.3676158862. The cubic root of 123907345 is about 498.5388609714.

The spelling of 123907345 in words is "one hundred twenty-three million, nine hundred seven thousand, three hundred forty-five".