127931397 has 8 divisors (see below), whose sum is σ = 186082080. Its totient is φ = 77534160.

The previous prime is 127931393. The next prime is 127931413. The reversal of 127931397 is 793139721.

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

It is not a de Polignac number, because 127931397 - 2² = 127931393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127931393) 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, 1938322 + ... + 1938387.

It is an arithmetic number, because the mean of its divisors is an integer number (23260260).

Almost surely, 2^127931397 is an apocalyptic number.

It is an amenable number.

127931397 is a deficient number, since it is larger than the sum of its proper divisors (58150683).

127931397 is a wasteful number, since it uses less digits than its factorization.

127931397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876723.

The product of its digits is 71442, while the sum is 42.

The square root of 127931397 is about 11310.6762397303. The cubic root of 127931397 is about 503.8783680723.

The spelling of 127931397 in words is "one hundred twenty-seven million, nine hundred thirty-one thousand, three hundred ninety-seven".