128093939 has 2 divisors, whose sum is σ = 128093940. Its totient is φ = 128093938.

The previous prime is 128093879. The next prime is 128093971. The reversal of 128093939 is 939390821.

It is a strong prime.

It is an emirp because it is prime and its reverse (939390821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128093939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128093939.

It is not a weakly prime, because it can be changed into another prime (128093989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64046969 + 64046970.

It is an arithmetic number, because the mean of its divisors is an integer number (64046970).

Almost surely, 2^128093939 is an apocalyptic number.

128093939 is a deficient number, since it is larger than the sum of its proper divisors (1).

128093939 is an equidigital number, since it uses as much as digits as its factorization.

128093939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 128093939 is about 11317.8592940538. The cubic root of 128093939 is about 504.0916770221.

The spelling of 128093939 in words is "one hundred twenty-eight million, ninety-three thousand, nine hundred thirty-nine".