128719087 has 16 divisors (see below), whose sum is σ = 156148992. Its totient is φ = 103582080.

The previous prime is 128719069. The next prime is 128719117. The reversal of 128719087 is 780917821.

It is a happy number.

It is not a de Polignac number, because 128719087 - 2⁷ = 128718959 is a prime.

It is a super-2 number, since 2×128719087² = 33137206716227138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128719007) 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, 57328 + ... + 59530.

It is an arithmetic number, because the mean of its divisors is an integer number (9759312).

Almost surely, 2^128719087 is an apocalyptic number.

128719087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128719087 is a deficient number, since it is larger than the sum of its proper divisors (27429905).

128719087 is a wasteful number, since it uses less digits than its factorization.

128719087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718.

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 128719087 is about 11345.4434466000. The cubic root of 128719087 is about 504.9104007297.

The spelling of 128719087 in words is "one hundred twenty-eight million, seven hundred nineteen thousand, eighty-seven".