128117351 has 2 divisors, whose sum is σ = 128117352. Its totient is φ = 128117350.

The previous prime is 128117317. The next prime is 128117357. The reversal of 128117351 is 153711821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128117351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128117357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64058675 + 64058676.

It is an arithmetic number, because the mean of its divisors is an integer number (64058676).

Almost surely, 2^128117351 is an apocalyptic number.

128117351 is a deficient number, since it is larger than the sum of its proper divisors (1).

128117351 is an equidigital number, since it uses as much as digits as its factorization.

128117351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 29.

The square root of 128117351 is about 11318.8935413317. The cubic root of 128117351 is about 504.1223864517.

The spelling of 128117351 in words is "one hundred twenty-eight million, one hundred seventeen thousand, three hundred fifty-one".