128264923 has 2 divisors, whose sum is σ = 128264924. Its totient is φ = 128264922.

The previous prime is 128264921. The next prime is 128264947. The reversal of 128264923 is 329462821.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (329462821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128264923 - 2¹ = 128264921 is a prime.

Together with 128264921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (128264921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64132461 + 64132462.

It is an arithmetic number, because the mean of its divisors is an integer number (64132462).

Almost surely, 2^128264923 is an apocalyptic number.

128264923 is a deficient number, since it is larger than the sum of its proper divisors (1).

128264923 is an equidigital number, since it uses as much as digits as its factorization.

128264923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 128264923 is about 11325.4105002865. The cubic root of 128264923 is about 504.3158700113.

The spelling of 128264923 in words is "one hundred twenty-eight million, two hundred sixty-four thousand, nine hundred twenty-three".