128146377 has 4 divisors (see below), whose sum is σ = 170861840. Its totient is φ = 85430916.

The previous prime is 128146351. The next prime is 128146387. The reversal of 128146377 is 773641821.

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 not a de Polignac number, because 128146377 - 2⁸ = 128146121 is a prime.

It is a super-3 number, since 3×128146377³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128146327) 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, 21357727 + ... + 21357732.

It is an arithmetic number, because the mean of its divisors is an integer number (42715460).

Almost surely, 2^128146377 is an apocalyptic number.

It is an amenable number.

128146377 is a deficient number, since it is larger than the sum of its proper divisors (42715463).

128146377 is an equidigital number, since it uses as much as digits as its factorization.

128146377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42715462.

The product of its digits is 56448, while the sum is 39.

The square root of 128146377 is about 11320.1756611812. The cubic root of 128146377 is about 504.1604545494.

It can be divided in two parts, 12814 and 6377, that added together give a palindrome (19191).

The spelling of 128146377 in words is "one hundred twenty-eight million, one hundred forty-six thousand, three hundred seventy-seven".