126688193 has 4 divisors (see below), whose sum is σ = 127850580. Its totient is φ = 125525808.

The previous prime is 126688189. The next prime is 126688231. The reversal of 126688193 is 391886621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103571329 + 23116864 = 10177^2 + 4808^2 .

It is a cyclic number.

It is not a de Polignac number, because 126688193 - 2² = 126688189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126688123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581030 + ... + 581247.

It is an arithmetic number, because the mean of its divisors is an integer number (31962645).

Almost surely, 2^126688193 is an apocalyptic number.

It is an amenable number.

126688193 is a deficient number, since it is larger than the sum of its proper divisors (1162387).

126688193 is a wasteful number, since it uses less digits than its factorization.

126688193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162386.

The product of its digits is 124416, while the sum is 44.

The square root of 126688193 is about 11255.5849692497. The cubic root of 126688193 is about 502.2408660355.

The spelling of 126688193 in words is "one hundred twenty-six million, six hundred eighty-eight thousand, one hundred ninety-three".