123746009 has 4 divisors (see below), whose sum is σ = 131025204. Its totient is φ = 116466816.

The previous prime is 123745997. The next prime is 123746011. The reversal of 123746009 is 900647321.

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 53655625 + 70090384 = 7325^2 + 8372^2 .

It is a cyclic number.

It is not a de Polignac number, because 123746009 - 2⁸ = 123745753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123746059) 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, 3639572 + ... + 3639605.

It is an arithmetic number, because the mean of its divisors is an integer number (32756301).

Almost surely, 2^123746009 is an apocalyptic number.

It is an amenable number.

123746009 is a deficient number, since it is larger than the sum of its proper divisors (7279195).

123746009 is an equidigital number, since it uses as much as digits as its factorization.

123746009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279194.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 123746009 is about 11124.1183470871. The cubic root of 123746009 is about 498.3223895415.

The spelling of 123746009 in words is "one hundred twenty-three million, seven hundred forty-six thousand, nine".