128369719 has 16 divisors (see below), whose sum is σ = 137479680. Its totient is φ = 119517120.

The previous prime is 128369713. The next prime is 128369723. The reversal of 128369719 is 917963821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 128369719 - 2¹¹ = 128367671 is a prime.

It is a super-2 number, since 2×128369719² = 32957569512277922, 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 (128369713) 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, 473554 + ... + 473824.

It is an arithmetic number, because the mean of its divisors is an integer number (8592480).

Almost surely, 2^128369719 is an apocalyptic number.

128369719 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128369719 is a deficient number, since it is larger than the sum of its proper divisors (9109961).

128369719 is a wasteful number, since it uses less digits than its factorization.

128369719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630.

The product of its digits is 163296, while the sum is 46.

The square root of 128369719 is about 11330.0361429256. The cubic root of 128369719 is about 504.4531793079.

The spelling of 128369719 in words is "one hundred twenty-eight million, three hundred sixty-nine thousand, seven hundred nineteen".