128377371 has 4 divisors (see below), whose sum is σ = 171169832. Its totient is φ = 85584912.

The previous prime is 128377369. The next prime is 128377393. The reversal of 128377371 is 173773821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 128377371 - 2¹ = 128377369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128377321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21396226 + ... + 21396231.

It is an arithmetic number, because the mean of its divisors is an integer number (42792458).

Almost surely, 2^128377371 is an apocalyptic number.

128377371 is a deficient number, since it is larger than the sum of its proper divisors (42792461).

128377371 is an equidigital number, since it uses as much as digits as its factorization.

128377371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42792460.

The product of its digits is 49392, while the sum is 39.

The square root of 128377371 is about 11330.3738243714. The cubic root of 128377371 is about 504.4632024376.

The spelling of 128377371 in words is "one hundred twenty-eight million, three hundred seventy-seven thousand, three hundred seventy-one".