127820397 has 8 divisors (see below), whose sum is σ = 170511040. Its totient is φ = 85171680.

The previous prime is 127820387. The next prime is 127820417. The reversal of 127820397 is 793028721.

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

It is not a de Polignac number, because 127820397 - 2¹² = 127816301 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 (127820387) 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, 2497 + ... + 16182.

It is an arithmetic number, because the mean of its divisors is an integer number (21313880).

Almost surely, 2^127820397 is an apocalyptic number.

It is an amenable number.

127820397 is a deficient number, since it is larger than the sum of its proper divisors (42690643).

127820397 is a wasteful number, since it uses less digits than its factorization.

127820397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20963.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 127820397 is about 11305.7683064885. The cubic root of 127820397 is about 503.7325954576.

The spelling of 127820397 in words is "one hundred twenty-seven million, eight hundred twenty thousand, three hundred ninety-seven".