128554923 has 32 divisors (see below), whose sum is σ = 205701120. Its totient is φ = 69864480.

The previous prime is 128554919. The next prime is 128554939. The reversal of 128554923 is 329455821.

It is not a de Polignac number, because 128554923 - 2² = 128554919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128554903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36736 + ... + 40082.

It is an arithmetic number, because the mean of its divisors is an integer number (6428160).

Almost surely, 2^128554923 is an apocalyptic number.

128554923 is a deficient number, since it is larger than the sum of its proper divisors (77146197).

128554923 is a wasteful number, since it uses less digits than its factorization.

128554923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447.

The product of its digits is 86400, while the sum is 39.

The square root of 128554923 is about 11338.2063396289. The cubic root of 128554923 is about 504.6956608246.

The spelling of 128554923 in words is "one hundred twenty-eight million, five hundred fifty-four thousand, nine hundred twenty-three".