128631343 has 4 divisors (see below), whose sum is σ = 128690208. Its totient is φ = 128572480.

The previous prime is 128631337. The next prime is 128631353. The reversal of 128631343 is 343136821.

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

It is a cyclic number.

It is not a de Polignac number, because 128631343 - 2¹³ = 128623151 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 (128631353) 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, 26023 + ... + 30568.

It is an arithmetic number, because the mean of its divisors is an integer number (32172552).

Almost surely, 2^128631343 is an apocalyptic number.

128631343 is a deficient number, since it is larger than the sum of its proper divisors (58865).

128631343 is an equidigital number, since it uses as much as digits as its factorization.

128631343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58864.

The product of its digits is 10368, while the sum is 31.

The square root of 128631343 is about 11341.5758605231. The cubic root of 128631343 is about 504.7956471483.

The spelling of 128631343 in words is "one hundred twenty-eight million, six hundred thirty-one thousand, three hundred forty-three".