123400443 has 8 divisors (see below), whose sum is σ = 164873728. Its totient is φ = 82097064.

The previous prime is 123400397. The next prime is 123400463. The reversal of 123400443 is 344004321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123400443 - 2⁶ = 123400379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123400463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40771 + ... + 43692.

It is an arithmetic number, because the mean of its divisors is an integer number (20609216).

Almost surely, 2^123400443 is an apocalyptic number.

123400443 is a deficient number, since it is larger than the sum of its proper divisors (41473285).

123400443 is an equidigital number, since it uses as much as digits as its factorization.

123400443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84953.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 123400443 is about 11108.5752011678. The cubic root of 123400443 is about 497.8580949206.

Adding to 123400443 its reverse (344004321), we get a palindrome (467404764).

The spelling of 123400443 in words is "one hundred twenty-three million, four hundred thousand, four hundred forty-three".