128249383 has 4 divisors (see below), whose sum is σ = 128966040. Its totient is φ = 127532728.

The previous prime is 128249371. The next prime is 128249413. The reversal of 128249383 is 383942821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 383942821 = 37 ⋅10376833.

It is a cyclic number.

It is not a de Polignac number, because 128249383 - 2⁵ = 128249351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128249333) 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, 358060 + ... + 358417.

It is an arithmetic number, because the mean of its divisors is an integer number (32241510).

Almost surely, 2^128249383 is an apocalyptic number.

128249383 is a deficient number, since it is larger than the sum of its proper divisors (716657).

128249383 is an equidigital number, since it uses as much as digits as its factorization.

128249383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716656.

The product of its digits is 82944, while the sum is 40.

The square root of 128249383 is about 11324.7244116579. The cubic root of 128249383 is about 504.2955023095.

The spelling of 128249383 in words is "one hundred twenty-eight million, two hundred forty-nine thousand, three hundred eighty-three".