128149927 has 16 divisors (see below), whose sum is σ = 147765600. Its totient is φ = 110315520.

The previous prime is 128149921. The next prime is 128149949. The reversal of 128149927 is 729941821.

It is a happy number.

It is not a de Polignac number, because 128149927 - 2¹⁹ = 127625639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128149921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2527 + ... + 16207.

It is an arithmetic number, because the mean of its divisors is an integer number (9235350).

Almost surely, 2^128149927 is an apocalyptic number.

128149927 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128149927 is a deficient number, since it is larger than the sum of its proper divisors (19615673).

128149927 is a wasteful number, since it uses less digits than its factorization.

128149927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13746.

The product of its digits is 72576, while the sum is 43.

The square root of 128149927 is about 11320.3324597823. The cubic root of 128149927 is about 504.1651100408.

The spelling of 128149927 in words is "one hundred twenty-eight million, one hundred forty-nine thousand, nine hundred twenty-seven".