128697343 has 4 divisors (see below), whose sum is σ = 128722480. Its totient is φ = 128672208.

The previous prime is 128697329. The next prime is 128697383. The reversal of 128697343 is 343796821.

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 128697343 - 2⁹ = 128696831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128697343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128697383) 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, 1830 + ... + 16147.

It is an arithmetic number, because the mean of its divisors is an integer number (32180620).

Almost surely, 2^128697343 is an apocalyptic number.

128697343 is a deficient number, since it is larger than the sum of its proper divisors (25137).

128697343 is an equidigital number, since it uses as much as digits as its factorization.

128697343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25136.

The product of its digits is 217728, while the sum is 43.

The square root of 128697343 is about 11344.4851359592. The cubic root of 128697343 is about 504.8819682978.

The spelling of 128697343 in words is "one hundred twenty-eight million, six hundred ninety-seven thousand, three hundred forty-three".