128369723 has 2 divisors, whose sum is σ = 128369724. Its totient is φ = 128369722.

The previous prime is 128369713. The next prime is 128369741. The reversal of 128369723 is 327963821.

It is a weak prime.

It is an emirp because it is prime and its reverse (327963821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128369723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (128369713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64184861 + 64184862.

It is an arithmetic number, because the mean of its divisors is an integer number (64184862).

Almost surely, 2^128369723 is an apocalyptic number.

128369723 is a deficient number, since it is larger than the sum of its proper divisors (1).

128369723 is an equidigital number, since it uses as much as digits as its factorization.

128369723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 128369723 is about 11330.0363194475. The cubic root of 128369723 is about 504.4531845475.

The spelling of 128369723 in words is "one hundred twenty-eight million, three hundred sixty-nine thousand, seven hundred twenty-three".