128957093 has 2 divisors, whose sum is σ = 128957094. Its totient is φ = 128957092.

The previous prime is 128957089. The next prime is 128957107. The reversal of 128957093 is 390759821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122722084 + 6235009 = 11078^2 + 2497^2 .

It is an emirp because it is prime and its reverse (390759821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128957093 - 2² = 128957089 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128957293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64478546 + 64478547.

It is an arithmetic number, because the mean of its divisors is an integer number (64478547).

Almost surely, 2^128957093 is an apocalyptic number.

It is an amenable number.

128957093 is a deficient number, since it is larger than the sum of its proper divisors (1).

128957093 is an equidigital number, since it uses as much as digits as its factorization.

128957093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 128957093 is about 11355.9276591567. The cubic root of 128957093 is about 505.2214079947.

The spelling of 128957093 in words is "one hundred twenty-eight million, nine hundred fifty-seven thousand, ninety-three".