128162317 has 8 divisors (see below), whose sum is σ = 132499136. Its totient is φ = 123887232.

The previous prime is 128162311. The next prime is 128162323. The reversal of 128162317 is 713261821.

It is an interprime number because it is at equal distance from previous prime (128162311) and next prime (128162323).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128162317 - 2⁷ = 128162189 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 (128162311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11193 + ... + 19534.

It is an arithmetic number, because the mean of its divisors is an integer number (16562392).

Almost surely, 2^128162317 is an apocalyptic number.

It is an amenable number.

128162317 is a deficient number, since it is larger than the sum of its proper divisors (4336819).

128162317 is an equidigital number, since it uses as much as digits as its factorization.

128162317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30867.

The product of its digits is 4032, while the sum is 31.

The square root of 128162317 is about 11320.8796919674. The cubic root of 128162317 is about 504.1813576880.

The spelling of 128162317 in words is "one hundred twenty-eight million, one hundred sixty-two thousand, three hundred seventeen".