128348377 has 4 divisors (see below), whose sum is σ = 129973120. Its totient is φ = 126723636.

The previous prime is 128348347. The next prime is 128348387. The reversal of 128348377 is 773843821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128348377 - 2¹¹ = 128346329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128348347) 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, 812253 + ... + 812410.

It is an arithmetic number, because the mean of its divisors is an integer number (32493280).

Almost surely, 2^128348377 is an apocalyptic number.

It is an amenable number.

128348377 is a deficient number, since it is larger than the sum of its proper divisors (1624743).

128348377 is an equidigital number, since it uses as much as digits as its factorization.

128348377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624742.

The product of its digits is 225792, while the sum is 43.

The square root of 128348377 is about 11329.0942709468. The cubic root of 128348377 is about 504.4252219451.

The spelling of 128348377 in words is "one hundred twenty-eight million, three hundred forty-eight thousand, three hundred seventy-seven".