128699197 has 24 divisors (see below), whose sum is σ = 154490112. Its totient is φ = 105849600.

The previous prime is 128699183. The next prime is 128699201. The reversal of 128699197 is 791996821.

It is not a de Polignac number, because 128699197 - 2⁷ = 128699069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128691197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 863679 + ... + 863827.

It is an arithmetic number, because the mean of its divisors is an integer number (6437088).

Almost surely, 2^128699197 is an apocalyptic number.

128699197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

128699197 is a deficient number, since it is larger than the sum of its proper divisors (25790915).

128699197 is a wasteful number, since it uses less digits than its factorization.

128699197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 208 counting only the distinct ones).

The product of its digits is 489888, while the sum is 52.

The square root of 128699197 is about 11344.5668493777. The cubic root of 128699197 is about 504.8843927112.

The spelling of 128699197 in words is "one hundred twenty-eight million, six hundred ninety-nine thousand, one hundred ninety-seven".