128343941 has 4 divisors (see below), whose sum is σ = 140011584. Its totient is φ = 116676300.

The previous prime is 128343923. The next prime is 128343947. The reversal of 128343941 is 149343821.

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, and also an emirpimes, since its reverse is a distinct semiprime: 149343821 = 11 ⋅13576711.

It is a cyclic number.

It is not a de Polignac number, because 128343941 - 2⁶ = 128343877 is a prime.

It is a super-2 number, since 2×128343941² = 32944334382822962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128343947) 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, 5833805 + ... + 5833826.

It is an arithmetic number, because the mean of its divisors is an integer number (35002896).

Almost surely, 2^128343941 is an apocalyptic number.

128343941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128343941 is a deficient number, since it is larger than the sum of its proper divisors (11667643).

128343941 is a wasteful number, since it uses less digits than its factorization.

128343941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11667642.

The product of its digits is 20736, while the sum is 35.

The square root of 128343941 is about 11328.8984901446. The cubic root of 128343941 is about 504.4194105326.

The spelling of 128343941 in words is "one hundred twenty-eight million, three hundred forty-three thousand, nine hundred forty-one".