123740417 has 2 divisors, whose sum is σ = 123740418. Its totient is φ = 123740416.

The previous prime is 123740413. The next prime is 123740431. The reversal of 123740417 is 714047321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65431921 + 58308496 = 8089^2 + 7636^2 .

It is a cyclic number.

It is not a de Polignac number, because 123740417 - 2² = 123740413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123740417.

It is not a weakly prime, because it can be changed into another prime (123740413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61870208 + 61870209.

It is an arithmetic number, because the mean of its divisors is an integer number (61870209).

Almost surely, 2^123740417 is an apocalyptic number.

It is an amenable number.

123740417 is a deficient number, since it is larger than the sum of its proper divisors (1).

123740417 is an equidigital number, since it uses as much as digits as its factorization.

123740417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 123740417 is about 11123.8669984857. The cubic root of 123740417 is about 498.3148831425.

Adding to 123740417 its reverse (714047321), we get a palindrome (837787738).

The spelling of 123740417 in words is "one hundred twenty-three million, seven hundred forty thousand, four hundred seventeen".