123938407 has 2 divisors, whose sum is σ = 123938408. Its totient is φ = 123938406.

The previous prime is 123938393. The next prime is 123938443. The reversal of 123938407 is 704839321.

It is a weak prime.

It is an emirp because it is prime and its reverse (704839321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123938407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123938447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61969203 + 61969204.

It is an arithmetic number, because the mean of its divisors is an integer number (61969204).

Almost surely, 2^123938407 is an apocalyptic number.

123938407 is a deficient number, since it is larger than the sum of its proper divisors (1).

123938407 is an equidigital number, since it uses as much as digits as its factorization.

123938407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 123938407 is about 11132.7627748012. The cubic root of 123938407 is about 498.5805166141.

The spelling of 123938407 in words is "one hundred twenty-three million, nine hundred thirty-eight thousand, four hundred seven".