123740443 has 2 divisors, whose sum is σ = 123740444. Its totient is φ = 123740442.

The previous prime is 123740431. The next prime is 123740447. The reversal of 123740443 is 344047321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123740443 - 2²⁵ = 90186011 is a prime.

It is not a weakly prime, because it can be changed into another prime (123740447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61870221 + 61870222.

It is an arithmetic number, because the mean of its divisors is an integer number (61870222).

Almost surely, 2^123740443 is an apocalyptic number.

123740443 is a deficient number, since it is larger than the sum of its proper divisors (1).

123740443 is an equidigital number, since it uses as much as digits as its factorization.

123740443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 123740443 is about 11123.8681671440. The cubic root of 123740443 is about 498.3149180440.

Adding to 123740443 its reverse (344047321), we get a palindrome (467787764).

The spelling of 123740443 in words is "one hundred twenty-three million, seven hundred forty thousand, four hundred forty-three".