128719081 has 16 divisors (see below), whose sum is σ = 137649600. Its totient is φ = 120149568.

The previous prime is 128719069. The next prime is 128719117. The reversal of 128719081 is 180917821.

It is not a de Polignac number, because 128719081 - 2¹¹ = 128717033 is a prime.

It is a super-2 number, since 2×128719081² = 33137203626969122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128719081.

It is not an unprimeable number, because it can be changed into a prime (128719001) 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, 135450 + ... + 136396.

It is an arithmetic number, because the mean of its divisors is an integer number (8603100).

Almost surely, 2^128719081 is an apocalyptic number.

It is an amenable number.

128719081 is a deficient number, since it is larger than the sum of its proper divisors (8930519).

128719081 is a wasteful number, since it uses less digits than its factorization.

128719081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 128719081 is about 11345.4431821767. The cubic root of 128719081 is about 504.9103928845.

It can be divided in two parts, 12871 and 9081, that added together give a cube (21952 = 28³).

The spelling of 128719081 in words is "one hundred twenty-eight million, seven hundred nineteen thousand, eighty-one".