263128197 has 16 divisors (see below), whose sum is σ = 357477120. Its totient is φ = 172113600.

The previous prime is 263128171. The next prime is 263128213. The reversal of 263128197 is 791821362.

263128197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 263128197 - 2⁶ = 263128133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263128157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82804 + ... + 85922.

It is an arithmetic number, because the mean of its divisors is an integer number (22342320).

Almost surely, 2^263128197 is an apocalyptic number.

It is an amenable number.

263128197 is a deficient number, since it is larger than the sum of its proper divisors (94348923).

263128197 is a wasteful number, since it uses less digits than its factorization.

263128197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644.

The product of its digits is 36288, while the sum is 39.

The square root of 263128197 is about 16221.2267415261. The cubic root of 263128197 is about 640.7999412992.

The spelling of 263128197 in words is "two hundred sixty-three million, one hundred twenty-eight thousand, one hundred ninety-seven".