126668309 has 8 divisors (see below), whose sum is σ = 134447040. Its totient is φ = 118926016.

The previous prime is 126668293. The next prime is 126668329. The reversal of 126668309 is 903866621.

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

It is not a de Polignac number, because 126668309 - 2⁴ = 126668293 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 (126668329) 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, 1769 + ... + 16014.

It is an arithmetic number, because the mean of its divisors is an integer number (16805880).

Almost surely, 2^126668309 is an apocalyptic number.

It is an amenable number.

126668309 is a deficient number, since it is larger than the sum of its proper divisors (7778731).

126668309 is a wasteful number, since it uses less digits than its factorization.

126668309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18219.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 126668309 is about 11254.7016397593. The cubic root of 126668309 is about 502.2145887120.

The spelling of 126668309 in words is "one hundred twenty-six million, six hundred sixty-eight thousand, three hundred nine".