123443401 has 4 divisors (see below), whose sum is σ = 127700100. Its totient is φ = 119186704.

The previous prime is 123443393. The next prime is 123443407. The reversal of 123443401 is 104344321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104344321 = 1423 ⋅73327.

It can be written as a sum of positive squares in 2 ways, for example, as 74373376 + 49070025 = 8624^2 + 7005^2 .

It is a cyclic number.

It is not a de Polignac number, because 123443401 - 2³ = 123443393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123443407) 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, 2128306 + ... + 2128363.

It is an arithmetic number, because the mean of its divisors is an integer number (31925025).

Almost surely, 2^123443401 is an apocalyptic number.

It is an amenable number.

123443401 is a deficient number, since it is larger than the sum of its proper divisors (4256699).

123443401 is an equidigital number, since it uses as much as digits as its factorization.

123443401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256698.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 123443401 is about 11110.5085842188. The cubic root of 123443401 is about 497.9158594534.

Adding to 123443401 its reverse (104344321), we get a palindrome (227787722).

The spelling of 123443401 in words is "one hundred twenty-three million, four hundred forty-three thousand, four hundred one".